Question

State the structural and the functional unit of the nervous system. Draw its neat labelled diagram and write two functions.

Answer 1

The structural and functional unit of the nervous system is the neuron.

The functions of the neuron are: 

(a) Passing of information takes place- 

(i) By electric impulse (inside the neuron) and 

(ii) In the form of chemicals (At synapse) 

(b) Reflex action- spontaneous, involuntary and automatic response to a stimulus to protect us from harmful situations. For example, on touching a hot object unknowingly we instantly withdraw our hand.