Question

The electrical impulse travels in a neuron from

• A. Dendrite → axon → axonal end → cell body
• B. Cell body → dendrite → axon → axonal end
• C. Dendrite → cell body → axon → axonal end
• D. Axonal end → axon → cell body → dendrite

Answer 1

The correct option is C

Dendrite → cell body → axon → axonal end

The correct option is C.

Explanation of the correct option:

1. An external or internal stimulus causes the receptors to convert the stimuli into electrical impulses which are carried by the neurons to the nervous system that processes the information and elicits a response in the body.
2. A neuron consists of a cell body, branched projections called dendrites, and an axon.
3. The dendrites receive the nerve impulse from cells which are passed to the cell body and through the axon.
4. The nerve impulse is transmitted to the dendrites of the next neuron via the synapse.
5. When the nerve impulse reaches the axon terminal, neurotransmitters are released by the axon in the synapse.
6. The neurotransmitters bind to their receptors on the dendrites of the next neuron thereby stimulating the neuron.
7. In this way, the impulses are transmitted from one neuron to the other.

Final answer: The electrical impulse travels in a neuron from Dendrite → cell body → axon → axonal end.