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GSEB Solutions for ધોરણ ૧૦ English

GSEB std 10 science solution for Gujarati check Subject Chapters Wise::

Control and coordination are the functions of the nervous system and ……… in our body.

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જવાબ : Hormones


The nervous system uses ……… impulses to transmit messages.

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જવાબ : Electrical


Central nervous system consists of ……… and ……… .

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જવાબ : Brain, spinal cord


Largest part of the brain is ……… .

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જવાબ : Cerebrum


Defeciency of ……… hormone in childhood leads to dwarfism in humans.

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જવાબ : Growth


The growth of pollen tubes towards the ovules is the result of a ……… movement.

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જવાબ : Chemotropic


The information is acquired by the tip of the ………… of a nerve cell which sets off ………… impulse in it.

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જવાબ : dendrite, electrical


Chemicals released from the nerve endings of one neuron travel through a gap called …………. to reach the next neuron.

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જવાબ : Synapse


The fundamental unit of the tissues for conducting information via electrical impulses from one part of the body to another are called ………… or ………… .

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જવાબ : nerve cells, neurons


The ………… are the quick responses produced involuntarily in human beings to protect them from the situation which may be dangerous to them e.g., touching a hot object.

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જવાબ : reflex actions


The centre associated with hunger which gives a sensation of feeling full is present in the ………… part of the human brain.

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જવાબ : fore brain


The spinal cord is protected by the ………… or the backbone.

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જવાબ : vertebral column


Directional movement in seedling is a ………… dependent movement.

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જવાબ : growth


Movement of roots away from light is an example of ………… phototropism.

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જવાબ : negative


The plant hormone called ………… is involved in inhibiting growth and cause wilting of leaves.

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જવાબ : Abscisic acid


The element ………… is needed for the synthesis of thyroxin.

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જવાબ : iodine


Explain that how do we detect the smell of an agarbatti (incense stick)?

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જવાબ : The smell of agarbatti (incense stick) diffuses in the air. It is detected by olfactory receptors present in the nose. This information is sent to olfactory lobe by sensory nerves located in the forebrain. It responds to the information.


Differentiate between a reflex action and walking?

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જવાબ :

Reflex action
Walking
1. It is the action which is performed automatically.
1. It is a response to the information transmitted by nerve to muscles of the legs. In this case, thinking is involved.
2. It is controlled and coordinated by spinal cord.
2. Brain instructs and controls leg muscles to move.
3. It is an involuntary action.
3. It is a voluntary action.


What happens at the synapse between two neurons?

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જવાબ : The small empty space between two nerve cells is called synapse. At synapse, a chemical substance is produced at the end of axon of one nerve cell that reaches to the other nerve cell through the dendrite. Thus, information is transmitted from one nerve cell to other nerve cell by synapse.


Which part of the brain maintains posture and equilibrium of the body?

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જવાબ : Posture and equilibrium of the body are controlled by cerebellum.


What is the role of the brain in reflex action?

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જવાબ : There is no role of brain in reflex action. These involuntary actions are controlled by the spinal cord which takes place immediately without thinking of how to respond to the stimuli.


What are plant hormones?

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જવાબ : Plant hormones are also called phytohormones. Plant hormones are the chemical substances which help in controlling growth, flowering, height, development of plants and their response to the environment.


How does Auxin promote the growth of a tendril around a support?

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જવાબ : When the tip of a tendril touches a support, then the Auxin present in its tip move to that side of tip which is away from the support. Auxin promotes growth. So, due to more Auxin in it, the side of tendril away from the support grows faster (and becomes longer) than the side which is in contact with the support and makes the tendril twirl (or bend) around the support.


How does chemical coordination take place in animals?

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જવાબ : Chemical coordination in animals takes place through the hormones secreted by the endocrine glands. Coordination in animals takes place through hormone system as well as nervous system which is called endocrine system. Endocrine glands secrete animal hormones directly into the blood that reach to the specific cells. Special types of molecules are present on the surface of cells to detect these hormones. These cells act according to the information that a particular hormone carries.


Why is the use of iodized salt advisable?

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જવાબ : It is advised to use iodized salt because thyroid gland needs iodine to produce thyroxin hormone. Thyroxin hormone controls all the metabolic activities of our body like metabolism of carbohydrates, fats and protein etc. Due to the deficiency of thyroxin a disease called goitre is caused.


How does our body respond when adrenaline is secreted into the blood?

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જવાબ : The heart beat increases when adrenaline is secreted into the blood so that more oxygen is supplied to our muscles. The blood supply to the digestive system and skin decreases because the small arteries around the muscles of these organs contract. This turns the direction of blood towards our skeletal muscles. The breathing rate also increases due to the contractions of the diaphragm and rib muscles. All these responses enable us to face the situations of fear and anger.


Why are some patients of diabetes treated by giving injections of insulin?

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જવાબ : Insulin hormone regulates blood sugar levels. If this is not secreted in proper amounts, the sugar level in the blood rises. This causes many harmful effects.
To treat harmful effects of increased level of blood sugar, the diabetic patients are treated by giving injections of insulin.


How does phototropism occur in plants?

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જવાબ : The movement in any part of a plant due to light is called phototropism. The shoot of plant shows positive phototropism and roots show negative phototropism.
Phototropism in plants occurs due to the hormone Auxin. When light falls on one side of a plant, the secretion of Auxin hormone is more in the part away from the light. Hence, Auxin causes growth in length of the cells in shady part. So, the plant appears to bend towards light.


Which signals will get disrupted in case of a spinal cord injury?

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જવાબ : (i) All the involuntary actions will get disturbed.
(ii) Reflex actions will be disturbed because reflexes are located in the spinal cord. Therefore, the quick responses required to safe guard the body will not take place.


How does chemical coordination occur in plants?

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જવાબ : Chemical coordination in plants takes place with the help of plant hormones. In most of the regions where division takes place (meristematic regions) stimuli cells secrete chemical compounds (hormone). These substances identify the information by stimulating the other nearby cells and communicating the information.


What is the need for a system of control and coordination in an organism?

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જવાબ : An organism needs control and coordination system for the following functions :
(i) To save the body of the organisms from the harmful changes in the environment.
(ii) To control the speed of voluntary and involuntary actions.
(iii) To have the capability to think and learn for responding to any stimuli.


What are the hormones involved in providing milk to the suckling infant?

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જવાબ : 1. Prolactin (Maternity Hormone): Production of milk.
2. Oxytocin: Ejection of milk.


How does pancreas control glucose level of blood?

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જવાબ : Pancreas produces two hormones

  1. Insulin from P-cells of islet of Langerhans and
  2. Glucagon from a- cells of islets of Langerhans.
Insulin is produced when glucose level of blood rises. Insulin helps the cells to withdraw glucose from blood. It also converts glucose into glycogen in liver and muscles.


Glucagon is secreted when glucose level of blood falls. It mobilizes reserve food like glycogen into glucose. What is pregnancy hormone? Why is it known so?

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જવાબ : Progesterone is called pregnancy hormone. It helps in maintaining pregnancy by non-formation of new ova, promoting thickening and secretary activity of uterine wall and attachment of embryo to the uterine wall.


What is Dormin?

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જવાબ : Dormin is the other name of plant hormone abscisic acid. The hormone induces dormancy in buds and seeds. So it has been called Dormin.


List the similarities and differences between aerobic and anaerobic respiration.

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જવાબ : Similarity:
(i) In both aerobic and anaerobic respiration, food is broken down to release energy.
(ii) Both takes place inside cells.
(iii) Both produce byproducts.

Differences:

Aerobic Respiration
Anaerobic Respiration
(i) It takes place in the presence of oxygen.
(i) It takes place in the absence of oxygen.
(ii) Energy is released in higher amount.
(ii) Energy is released in lesser amount.
(iii) Carbon dioxide and water are produced as byproducts.
(iii) Carbon dioxide and water are produced as byproducts.
(iv) It is a slow process.
(iv) It is a fast process.
(v) Examples: Animals and plants cells.
(iv) Examples: Human cells, yeast, Bacteria etc.


How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

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જવાબ :

Movement of leaves of sensitive plant
Movement of a shoot towards light
1. It is a nastic movement which does not depend on the direction of stimulus applied.
1. It is a tropic movement which depends on the direction of stimulus applied.
2. The stimulus is touch.
2. The stimulus is light.
3. It is caused by the sudden loss of water from the swellings at the base of leaves.
3. It is caused by the unequal growth on the two sides of the shoot.
4. It is not a growth movement.
4. It is a growth movement.


How does chemical coordination take place in animals?

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જવાબ : Chemical coordination in animals takes place through the hormones secreted by the endocrine glands. Coordination in animals takes place through hormone system as well as nervous system which is called endocrine system. Endocrine glands secrete animal hormones directly into the blood that reach to the specific cells. Special type of molecules is present on the surface of cells to detect these hormones. These cells act according to the information that a particular hormone carries.


What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise? [AICBSE 2016]

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જવાબ : Receptors are specialized cells located in our sense organs like ear, nose, skin, tongue and eyes. The function of receptors is to detect information from the environment. For example, olfactory receptors detect smell. If receptors do not work properly, the information obtained from the environment will be delayed to reach the spinal cord or brain. In this situation, the response to the environmental stimulus will be delayed causing harm to the body. For example, if skin receptors are damaged, and one accidentally touches a hot object, then his/her hands might get burn as the damaged receptor cannot perceive the external stimuli of heat and pain.


How are involuntary actions and reflex actions different from each other?

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જવાબ :

Involuntary actions
Reflex actions
 1. Those actions which occur immediately without any thinking are called involuntary actions.
1. Reflex action is an immediate response to an event which does not require any processing by brain.
2. Involuntary actions are controlled by mid and hind brain.
Example: Breathing, beating of heart, etc.
2. Reflex actions are controlled by spinal cord.
Example: Sneezing, coughing, etc.


Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.

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જવાબ :

Nervous mechanism
Hormonal mechanism
It is a fast process.
It is a slow process.
Arteries and glands are affected.
It affects the target organ.
It transmits in electrochemical form.
It transmits in chemical form.
It does not control metabolism.
It controls metabolism.
Growth is not affected.
Growth is affected.


What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

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જવાબ :

Movement in a sensitive (mimosa) plant

Movement in legs of a human

1. The leaves of a sensitive plant like mimosa are sensitive to touch.
1. Leg is in control of nerve muscles.
2. It is not controlled by any part of the plant.
2. It is controlled by brain and spinal cord.
3. In this, cells change their shape on changing the amount of water in them.
3. Amount of water has no effect on the movement of muscles.
changing the amount of water in them.
the movement of muscles.
4. The movement in a sensitive plant are nastic movement.
4. The movement in our leg is due to voluntary nervous system.


(a)

1. Name the parts labeled A and B in the neuron drawn above.

2. Which part acquires the information in the neuron?

3. Through which part does the information travel?

4. In what form does this information travel?

5. Where is the impulse converted into a chemical signal for onward transmission?

(b) Name the hormone secreted by thyroid. What is the function?
(c) Why is the use of iodized salt advisable?
(CBSE A.I. 2008 Compt.)

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જવાબ : (a)

  1. A-Dendrite, B-Axon
  2. Dandrite.
  3. Dandrite to cell body or cyton to axon.
  4. Electrical impulse
  5. In the region of synapse.
Impulse stimulates the release of chemical neurotransmitter from the surface of presynaptic knob or bouton of axon terminal. Neurotransmitter (e.g. acetylcholine) comes in contact with chemoreceptor sites of post-synaptic membrane of the next neuron and generates a fresh impulse.

(b) Thyroxin:
Function of Thyroxin. It controls

  1. Basal metabolic rate
  2. Metabolism of carbohydrates, fats and proteins
  3. Consumption of energy in physical activity and body temperature
  4. Development and differentiation.
(c) Iodized Salt: Salt is iodized to provide iodine to thyroid for synthesis of thyroxin which is iodine containing hormone.


(a) What are plant hormones? Give one example each of a plant hormone that

  1. promotes growth
  2. Inhibits growth.
  3. promotes cell division
  4. Promotes the growth of a tendril around a support. (CCE 2011)
(b) Name the parts labeled A, B and C in the diagram given below. Write one function of each part. (CBSE A.I. 2008 Comptt. Delhi 2008 Comptt.)

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જવાબ : (a) Plant Hormones:
Phytohormones are chemical substances other than nutrients produced naturally in plants which regulate growth, development, differentiation and a number of physiological processes, e.g., Auxin, gibberellins, abscisic acid, cytokines.

  1. Hormone That Promotes Growth. Auxin/Gibberellin.
  2. Hormone That Inhibits Growth. Abscisic acid or ABA
  3. Hormone That Promotes Cell Division. Cytokinin.
  4. Hormone That Promotes Growth of a Tendril around a Support. Auxin.
(b) A-Pons Function: Relay centre, pneumotaxic area of respiratory centre.
B-Medulla Function: Reflex centre, cardiac centre, respiratory centre.
C-Cerebellum Function: Maintains equilibrium and coordinates muscular activities


How do tendrils reach the support when they do not have any sensory structures?

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જવાબ : Tendrils do not have any sensory structures but still they are able to find their support just as we grope in the dark for finding the switch-board. Tendrils perform Circumnutation from their apical regions. In this the terminal parts of tendrils move in all directions. Wherever they come in contact with a support, they stop performing Circumnutation. Instead, the contacted region shows little growth while the other side grows rapidly so that the tendril coils over the support.


Name the nervous system which controls the functioning of internal organs. How does this system work?

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જવાબ : Autonomous or visceral nervous system. The system does not consult the will of the individual. It works on its own inputs. Autonomous nervous system consists of only motor nerve fibers that innervate all organs and glands of the body. Depending upon the input, autonomous nervous system stimulates, slows down or stops the activity of an organ. For its working, autonomous or visceral nervous system has two components, sympathetic and parasympathetic. Sympathetic nervous system originates from thoracico-lumbar region, forms two ganglionic chains which send out long nerve fibres to various organs. The sympathetic nerve fibres activate the organs by release of nor-adrenaline. Parasympathetic nervous system is called cranio-sacral as it originates from some cranial and sacral nerves. It has long preganglionic fibres and ganglia attached to organs that are innervated. Its post ganglionic fibres secrete acetylcholine into organs for moderating or reducing their activity.


How does phototropism occur in plants?

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જવાબ :

Phototropism is a growth movement induced by a light stimulus. Growth towards a source of light is called positive phototropism, that away from the source is termed negative phototropism. The tips of shoots are usually positively, that of roots negatively phototropic.
Charles Darwin and his son Francis discovered (in 1880) that the phototropic stimulus is detected at the tip of the plant.
The Darwins used grass seedlings for some of their experiments. When grass seeds germinate, the primary leaf pierces the seed coverings and the soil while protected by the coleoptiles, a hollow, cylindrical sheath that surrounds it. Once the seedling has grown above the surface, the coleoptiles stops growing and the primary leaf pierces it.
The Darwins found that the tip of the coleoptiles was necessary for phototropism but that the bending takes place in the region below the tip.
If they placed an opaque cover over the tip, phototropism failed to occur even though the rest of the coleoptiles was illuminated from one side.
However, when they buried the plant in fine black sand so that only its tip was exposed, there was no interference with the tropism – the buried coleoptiles bent in the direction of the light.
From these experiments, it seemed clear that

  • The stimulus (light) was detected at one location (the tip)
  • The response (bending) was carried out at another (the region of elongation).
  • This implied that the tip was, in some way, communicating with the cells of the region of elongation.


How does chemical coordination occur in plants?

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જવાબ : It has been found that the growth of plants is regulated by certain chemical substances which are synthesized by the plants in very small amounts. These are known as plant hormones or phytohormones.

They are the organic substances which either promote or inhibit growth. A phytohormones can be defined as a chemical substances which are produced naturally in plants and are capable of translocation and regulating one or more physiological processes when present in low concentration. Main categories of plant hormones are:

  1. Auxins
  2. Gibberellins
  3. Cytokinins
  4. Ethylene
  5. Abscisic acid
Auxins and Gibberellins stimulate cell elongations, cytokinins stimulate cell division ethylene promotes transverse or isodiametric growth and abscisic acid is a growth inhibitor.


What is the need for a system of control and coordination in an organism?

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જવાબ : Co-ordination in this sense refers to the regulation or control of body activity.
Plants need very little in the way of a control system. Since growth and reproduction are about the only things that are regulated, a rapid control system is not required and hormonal control is all they possess.

Animals are continually moving through new environments that may pose all types of changes and threatening situations to the organism. This requires the rapid and precise control of a nervous system. Hormones regulate slower activities, such as growth, development and reproduction.


How are involuntary actions and reflex actions different from each other?

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જવાબ : All reflex actions are involuntary in nature but all involutary actions are not reflexes as the beating of heart is an involuntary action but is not reflex action.

Reflex actions are very quick but all involutary actions may not be very fast as in heart beating.
A reflex action may involve any muscle or a gland as we withdraw our hand on touching a hot object but all involuntary actions involve only smooth i.e., involuntary or cardiac muscles.

Reflex actions are at the level of spinal cord whereas the involuntary actions generally involve brain too.
Nerves and autonomious nervous system can increase or decrease the rate of involuntary actions but reflex actions can be controlled by great will only and are not usually controllable.

Reflex actions are done to meet emergencies where as an inv.action may or may not be for just meeting an emergency but may be a critical lie process as circulation of blood, swallowing of food, movement of food in food pipe, etc.


State the function of any three of the structural and functional unit of nervous system.

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જવાબ : Nervous system: Main parts of nervous system are: (i) Central nervous system, (ii) Peripheral nervous system, (iii) Autonomous System.
(i) Central Nervous System: It consist of
(a) Brain receives information carrying impulses from all the sensory organs (by sensory nerves) of the body and also from the spinal cord. The brain respond to the information by sending its own instructions (through motor nerves) to the muscles and glands to act accordingly. The brain also stores information and act as organ of thought and intelligence.
(b) Spinal cord: It is concerned with spinal reflex actions and the conduction of nerve impulses to and from the brain.
(ii) Peripheral Nervous system: it is composed of cranial nerves (nerves from the brain) and the spinal nerves. Both of these consist of sensory and motor neurons. So, they carry sensations to and messages from the brain and the spinal cord.
(iii) Autonomous Nervous System: It is that part of the peripheral nervous system which controls the activities of the internal organs such as stomach, heart-beat, etc. automatically even without our thinking about them. Its nerves are attached to the smooth muscles and control the activities of internal organs of the body involuntarily, many these nerves are connected with the mid- brain and hind-brain.


(a) If the cerebellum is not functioning properly, state the activities of our body that are affected.
(b) how do muscles move?

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જવાબ : (a) Cerebellum is not functioning properly may affect-
(i)Walking in straight line
(ii)Riding a cycle
(iii)Maintaining the posture and balance of the body
(iv)Movement is very coordinate, the patient sways in walking and tend to fall towards the affected side.
(v)It is responsible for precision of voluntary actions.
(b) When the decision to move is conveyed by a nerve to a muscle, it has to act. In response to nervous electrical impulses. The special proteins of the muscle change both their shape and their arrangement in the cell. This new arrangement of these proteins gives the muscle cells a shorter form that causes movement of the muscle.


“Use of iodised salt is essential”. List three reasons to justify this statement.

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જવાબ : (i) Iodised salt supplies sufficient amount of iodine through our diet, even in the areas where iodine is not available naturally through water or otherwise in diet.
(ii) Iodine is necessary for the thyroid glands to make thyroxine hormone.
(iii) Proper supply of iodine maintains thyroxine level that regulates carbohydrate, protein, and fat metabolism to provide the best balance for growth.
(iv) Deficiency of iodine causes many diseases such as Goitre.


What happens at the synapse between two neurons?

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જવાબ : A very small gap that occurs between the last portion of axon of one neuron and the dendron of the other neuron is known as a synapse. It acts as a one way valve to transmit impulses in one direction only. This uni-direction transfer of impulses occurs as the chemicals are produced in only one side of the neuron i.e., the axon’s side. From axon, the impulses travel across the synapse to the dendron of the other neuron.


What is the role of the brain in reflex action?

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જવાબ : Reflex actions are sudden responses, which do not involve any thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking as thinking may take time which would be enough to get us burnt.

The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is called a reflex arc. The reflex arcs −connections present between the input and output nerves − meet in a bundle in the spinal cord.


How does chemical coordination take place in animals?

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જવાબ : Chemical coordination takes place in animals with the help of hormones.Hormone is the chemical messenger that regulates the physiological processes in living organisms. It is secreted by glands. The regulation of physiological processes, and control and coordination by hormones comes under the endocrine system. The nervous system along with the endocrine system in our body controls and coordinates the physiological processes.


How does our body respond when adrenaline is secreted into the blood?

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જવાબ : Adrenalin is a hormone secreted by the adrenal glands in case of any danger or emergency or any kinds of stress. It is secreted directly into the blood and is transported to different parts of the body.

When secreted in large amounts, it speeds up the heartbeat and hence supplies more oxygen to the muscles. The breathing rate also increases due to contractions of diaphragm and rib muscles. It also increases the blood pressure. All these responses enable the body to deal with any stress or emergency.


How does chemical coordination occur in plants?

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જવાબ : In animals, control and coordination occur with the help of nervous system. However, plants do not have a nervous system.

Plants respond to stimuli by showing movements. The growth, development, and responses to the environment in plants is controlled and coordinated by a special class of chemical substances known as hormones. These hormones are produced in one part of the plant body and are translocated to other needy parts. For example, a hormone produced in roots is translocated to other parts when required. The five major types of phytohormone are Auxin, gibberellins, cytokines, abscisic acid, and ethylene. These phytohormone are either growth promoters (such as Auxin, gibberellins, cytokines, and ethylene) or growth inhibitors such as abscisic acid.


What is the need for a system of control and coordination in an organism?

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જવાબ : The maintenance of the body functions in response to changes in the body by working together of various integrated body systems is known as coordination. All the movements that occur in response to stimuli are carefully coordinated and controlled. In animals, the control and coordination movements are provided by nervous and muscular systems. The nervous system sends messages to and away from the brain. The spinal cord plays an important role in the relay of messages. In the absence of this system of control and coordination, our body will not be able to function properly. For example, when we accidentally touch a hot utensil, we immediately withdraw our hand. In the absence of nerve transmission, we will not withdraw our hand and may get burnt.


Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.

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જવાબ :

 

Nervous system mechanism

 

Hormonal system mechanism

1.

The information is conveyed in the form of electric impulse.

1.

The information is conveyed in the form of chemical messengers.

2.

The axons and dendrites transmit the information through a coordinated effort.

2.

The information is transmitted or transported through blood.

3.

The flow of information is rapid and the response is quick.

3.

The information travels slowly and the response is slow.

4.

Its effects are short lived.

4.

It has prolonged effects.


What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

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જવાબ :

 

Movement in sensitive plants

 

Movement in our legs

1.

The movementthat takes place in a sensitive plant such as Mimosa pudica occurs in response to touch (stimulus).

1.

Movement in our legs is an example of voluntary actions.

2.

For this movement, the information is transmitted from cell to cell by electro-chemical signals as plants do not have any specialised tissue for conduction of impulses.

2.

The signal or messages for these actions are passed to the brain and hence are consciously controlled.

3.

For this movement to occur, the plant cells change shape by changing the amount of water in them.

3.

In animal muscle cells, some proteins are found which allow the movement to occur.


What is the difference between a reflex action and walking?

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જવાબ : A reflex action is an automatic reaction for each stimulation in our body initiated by our sense responses e.g., we move our hand immediately after a contact with hot object. It is a direct controlled action. Walking is completely controlled by our brain. On the other hand, is a voluntary action. It requires complete coordination of muscles, bones, eyes etc.


How do we detect the smell of an agarbatti (incense stick)?

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જવાબ : Forebrain is responsible for thinking work. It has separate areas that are specialized for hearing, smelling, sight, taste, touch etc. The _ forebrain also has regions that collect information or impulses from various receptors. When the smell of an incense stick reaches us, out forebrain detects it. Then, the forebrain interprets it by putting it together with the information received from other receptors and also with the information already stored in the brain.


How does our body respond when adrenaline is secreted into the blood?

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જવાબ : Adrenaline is secreted directly into the blood and carried to different parts of the body. The target organs or the specific tissues on which is acts include the heart. As a result, the heart beats faster, resulting in supply of more oxygen to our muscles. The blood to the digestive system and skin is reduced due to contraction of muscles around small arteries in these organs. This diverts the blood to our skeletal muscles. The breathing rate also increases because of the contractions of the diaphragm and the rib muscles.


How are involuntary actions and reflex actions different from each other?

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જવાબ : Involuntary actions cannot be consciously controlled. For example, we cannot consciously control the movement of food in the alimentary canal. These actions are however, directly under the control of the brain. On the other hand, the reflex actions such as closing of eyes immediately when bright light is focused show sudden response and do not involve any thinking. This means that unlike involuntary actions, the reflex actions are not under the control of brain.


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Column I
Column II
(i) Thyroxin
(a) Puberty
(ii) Chemotropism
(b) Adrenaline
(ii) Body posture
(c) Tendril
(iv) Negative geotropism
(d) Gustatory
(v) Estrogen
(e) Goitre
(vi) Response to touch
(f) Cerebellum
(vii) Cell division
(g) Shoot system
(viii) Emergency situations
(h) Pollen tube
(ix) Taste
(i) Cytokinin
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જવાબ :

Column I
Column II
(i) Thyroxin
(e) Goitre
(ii) Chemotropism
(h) Pollen tube
(ii) Body posture
(f) Cerebellum
(iv) Negative geotropism
(g) Shoot system
(v) Estrogen
(a) Puberty
(vi) Response to touch
(c) Tendril
(vii) Cell division
(i) Cytokinin
(viii) Emergency situations
(b) Adrenaline
(ix) Taste
(d) Gustatory

Column A
Column B
(a) Olfactory receptors
(i) Tongue
(b) Thermo receptors (temperature receptors)
(ii) Eye
(c) Gustatoreceptors
(iii) Nose
(d) Photoreceptors
(iv) Skin
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જવાબ :

Column A

Column B

(a) Olfactory receptors
(iii) Nose
(b) Thermo receptors (temperature receptors)
(iv) Skin
(c) Gustatoreceptors
(i) Tongue
(d) Photoreceptors
(ii) Eye

‘A’ group
‘B’ group
a.
Xylitol
1.
Pigment
b.
Citric acid
2.
To impart sweetness
c.
Lycopene
3.
Microbial restrictor
d.
Nycin
4.
Protein binding emulsifier
 
 
5.
To impart acidity
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જવાબ :

‘A’ group
‘B’ group
a.
Xylitol
2.
To impart sweetness
b.
Citric acid
5.
To impart acidity
c.
Lycopene
1.
Pigment
d.
Nycin
3.
Microbial restrictor

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The GSEB Books for class 10 are designed as per the syllabus followed Gujarat Secondary and Higher Secondary Education Board provides key detailed, and a through solutions to all the questions relating to the GSEB textbooks.

The purpose is to provide help to the students with their homework, preparing for the examinations and personal learning. These books are very helpful for the preparation of examination.

For more details about the GSEB books for Class 10, you can access the PDF which is as in the above given links for the same.