Question

Differentiate between the following: 

(a) Spinal nerve and cranial nerve 

(b) Dendrite and axon 

(c) Central nervous system and peripheral nervous system

Answer 1

(a)

Spinal nerve	Cranial nerve
1. It arises from spinal cord.	1. It arises from brain.
2. Their functions are concerned mainly with the acitivities associated with head and neck.	2. Their functions are associated with all the body parts, below the neck.

(b)

Dendrite	Axon
1. They are the short branched parts, arises from the cell body.	1. It is a long unbranched part that comes from the cell body.
2. They receive messages from other cells.	2. They passes messages away from the cell body to other neurons, muscles and glands.

(c)

Central nervous system	Peripheral nervous system
1. It consists of brain and spinal cord.	1. It consists of cranial nerves, spinal nerves and visceral nerve
2. It contains centres for controlling various activities of the body.	2. No such centre is present for controlling, as nerves only transmit the impulse.