Question

Pick out the odd one out with a reason.

Cerebrum, cerebellum, axon, medulla

Answer 1

The odd one from the following is axon.

Explanation of the correct option :

1. Axon is the longest single extension of a neuron.
2. It is a tube-like structure that carries the nerve impulses to the other neurons.
3. They contain synapse or nerve endings where the signal transmission takes place.

Explanation of the incorrect options:

Cerebrum:

1. Cerebrum is known as the largest and most developed part of the brain.
2. It is responsible for the functions of memory, thinking, reasoning etc.

Cerebellum:

1. Second largest part of the brain, also known as little brain.
2. Controls the activities of voluntary muscles.

Medulla:

1. Brain stem also known as medulla oblongata is present at the posterior part of the brain.
2. It plays a vital role in controlling the involuntary actions of the viscera.

Hence, cerebrum, cerebellum and medulla are the different parts of brain, thus axon is the odd one.