Question

Select the INCORRECT statement about axon

• A. It is a single, long and usually unbranched process of neuron
• B. It arises from the cyton at axon hillock
• C. It carries the messages away from the cyton
• D. Bundle of axons outside the CNS is called 'tract'

Hint:

A bundle of axons is called a nerve outside the CNS and a tract inside it.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
The axon is the long process that carries impulses away from the cell body.

Step 2: True statements
It is single, long and usually unbranched, it arises from the cyton at the axon hillock, and it carries messages away from the cyton.

Step 3: The wrong statement
A bundle of axons outside the CNS is called a nerve. The term tract is used for bundles inside the brain and spinal cord.

Final Answer:
The incorrect statement calls a peripheral bundle of axons a tract. \[ \boxed{\text{(D) }\text{Bundle of axons outside the CNS is called `tract'}} \]