NCERT · Class 10 · Science

Chapter 6: Control and Coordination

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Exercise Questions

Textbook page 126 · 12 questions

Q11Written answer

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

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Worked solution

	Nervous control		Hormonal Control
1	It consists of nerve impulses between PNS, CNS and Brain.	1	It consists of the endocrine system which secretes hormones directly into blood.
2	Here response time is very short.	2	Here response time is very long.
3	Nerve impulses are not specific in their action.	3	Each hormone has specific actions.
4	The flow of information is rapid.	4	The flow of information is very slow.

Q12Written answer

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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Worked solution

Sl. no	Movement in sensitive plants		Movement in our legs
1	The movement in a sensitive plant is a response to stimulus (touch) which is an involuntary action.	1	Movement in our legs is a voluntary action.
2	No special tissue is there for the transfer of information	2	A complete system CNS and PNS is there for the information exchange.
3	Plant cells do not have specialized protein for movements.	3	Animal cells have specialized protein which help muscles to contract.

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