Q2 of 102 Page 118

What are the advantages of having a nervous system?

Advantages of the nervous system:

I. It helps in making a rapid adjustment to environmental stimuli.

II. It helps various body parts to remain in contact with each other.

III. It acts as the 'communicator system'.

IV. It allows carrying information generated from one part of the body to other.

What is meant by reflex action?

State whether the following are simple reflexes, conditioned reflexes or neither of the two.

(i) Sneezing………………

(ii) Blushing ……………………..

(iii) Contraction of eye pupil ..........

(iv) Lifting up a book ..............

(v) Knitting without looking.............

(vi) The sudden application of brakes of' the cycle on sighting an obstacle in front .........................

Why is the spinal cord and the brain referred to as the central nervous system?

What is the difference between reflex action and voluntary action?

Questions · 102

9. The Nervous System

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