Question

In a neuron, conversion of electrical signal to a chemical signal occurs in

• A. cell body
• B. axonal end
• C. dendritic end
• D. axon

Answer 1

The correct option is B

axonal end

The correct option is B.

Explanation of the correct option:

1. The axonal terminals release the neurotransmitters at the synapse.
2. The electrical impulse is converted into the chemical impulse in the synaptic cleft.
3. Therefore, conversion of an electrical signal into a chemical signal occurs at the axonal end.
4. Thus, the electrical impulse in the synapse travels from the axonal end of one neuron to the dendrite of the other neuron.

Explanation of the incorrect options:

Option A:

Cell body receives the electrical impulse from the dendrites.

Option C:

Dendritic ends of one neuron receive the electrical impulses from the axonal ends of another neuron and transmit them to the cell body.

Option D:

Axon is the longest single extension of a neuron that carries the nerve impulses to the other neurons via nerve endings.

Final answer: In a neuron, conversion of electrical signal to a chemical signal occurs in the axonal end.