(a) Name the part of brain which controls
(i) voluntary action, (ii) involuntary action.
(b) What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origin of the two.

Explanation

(a) (i) All the voluntary actions of the body are coordinated by the Cerebellum.
(ii) Various involuntary actions are controlled by Medulla.
(b) Peripheral nervous system is extended between central nervous system and body parts. The communication between the central nervous system and the other parts of the body is facilitated by the peripheral nervous system. On the basis of their origin, it is divided into two types of nerves.
(i) Cranial nerves. These nerves extend between the brain and parts of head exept `10^(th)` cranial nerves which extends up to the abdomen.
(ii) Spinal nerves. There nerves extend between spinal cord and the body parts.