With a neat labelled diagram explain the structure of a neuron.

What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.

Describe the structure of spinal cord.

How nerve impulses are transferred from one neuron to next neuron?

‘A’ is a cylindrical structure that begins from the lower end of medulla and extend downwards. It is enclosed in bony cage ‘B’ and covered by membranes ‘C’. As many as ‘D’ pairs of nerves arise from the structure ‘A’.
(i) What is A?
(ii) Name (a) bony cage ‘B’ and (b) membranes ‘C’
(iii) How much is D?