Question

The electrical impulse travels in a neuron from

• A. $dendrite\to axon\to axonalend\to cellbody$
• B. $cellbody\to dendrite\to axon\to axonalend$
• C. $dendrite\to cellbody\to axon\to axonalend$
• D. $axonalend\to axon\to cellbody\to dendrite$

Answer 1

The correct option is C

$\mathrm{dendrite}\to \mathrm{cell}\mathrm{body}\to \mathrm{axon}\to \mathrm{axonal}\mathrm{end}$

The correct option is C.

Explanation of the correct option:

1. A neuron is the basic functional unit of the nervous system and is responsible for receiving, conducting, and transferring nerve impulses.
2. The electrical impulses are received by the dendrites of the neurons.
3. The dendrites transfer these impulses to the cell body from which they emerge.
4. The axon receives the impulses from the cell body and transfers them to the axonal end.

Explanation of the incorrect options:

Option A:

The impulses are transferred from the dendrite to the cell body, not the axon. Hence, this option is incorrect.

Option B:

The impulses are first received by dendrites that emerge from the cell body. Hence, the given route is incorrect.

Option D:

The axonal end is the last part of the neuron that receives impulses and dendrites are the first. Hence, the option is incorrect.

Final answer:

The electrical impulse travels in a neuron from:

$\mathrm{dendrite}\to \mathrm{axon}\to \mathrm{axonal}\mathrm{end}\to \mathrm{cell}\mathrm{body}$