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7. Control and Coordination
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Q25 of 65 Page 230

With the help of a labelled diagram, illustrate the pathway of response when someone pricks in your hand with a pin.



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23

The feedback mechanism is an important aspect of hormonal coordination. Explain.

24


(i) Name the parts labelled as A and B in the diagram given above.


(ii) Which part acquires the information in the neuron?


(iii) Through which part does the information travel?


(iv) In what form does the information travel?


(v) Where is the impulse converted into a chemical signal for onward transmission?

26

(i) A nerve input signal travelled only up to the spinal cord and gave output signal for a response. What type of action did the body show-voluntary or involuntary?

(ii) Draw a nerve pathway for the above action and suggest specific terms for input nerve and output nerve.

27

Nerves and hormones both are used to control processes within the body. Using examples, show how nervous control and hormonal control.

(i) resemble and


(ii) differ from one another.

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7. Control and Coordination
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