Chapter 6 Control and Coordination

NCERT Class 10th

Science SOLUTIONS

Subject

Question

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

Updated on July 6, 2025 | By Learnzy Admin | 👁️ Views: 15 students

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Solution

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The nervous system uses electrical impulses to send messages through nerves. It works very fast and controls actions like movement or reflexes. The response is usually short-term and controlled by the brain and spinal cord. For example, pulling your hand away from a hot object is controlled by the nervous system.

The hormonal system (also called the endocrine system) uses chemical messengers called hormones. These hormones are released by endocrine glands into the bloodstream and work slowly. The effects are usually long-lasting and can affect multiple organs. For example, insulin controls the sugar level in the blood.

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More Questions on `Control and Coordination`

Question 1

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

Question 2

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

Question 3

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

Question 4

How does chemical coordination occur in plants?

Question 5

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

Question 6

How does phototropism occur in plants?

Question 7

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

Question 8

The brain is responsible for (a) thinking. (b) regulating the heart beat. (c) balancing the body. (d) all of the above.

Question 9

The gap between two neurons is called a (a) dendrite. (b) synapse. (c) axon. (d) impulse

Question 10

Which of the following is a plant hormone? (a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin.

Question 11

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

Question 12

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

Question 13

Why is the use of iodised salt advisable?

Question 14

How does chemical coordination take place in animals?

Question 15

How do auxins promote the growth of a tendril around a support?

Question 16

Give an example of a plant hormone that promotes growth.

Question 17

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

Question 18

What are plant hormones?

Question 19

What is the role of the brain in reflex action?

Question 20

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

Question 21

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

Question 22

What happens at the synapse between two neurons?

Question 23

What is the difference between a reflex action and walking?