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Question : Give scientific reasons of the following statement :

Answer»

Solution :(i) Surface of the cerebrum is highly folded toincrease the area for having more neurons.
(ii) Synapse acts as a one-wayvalve because neurotransmitter is secreated at the terminal knobs of axononly while dendrite membrane (post-synaptic membrane) has the enzyme to BREAK this neurotransmitter.
(iii) It is so becausenerve impulsein medullated nerve fibre jumpsfrom node to node (saltatory TRANSMISSION).
(iv) Antagonistic actions of the two systems HELP maintain homeostasis in the BODY.
(v)It is so because it is an acquired behaviour and not INBORN (inheriated) behaviour.


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