Question

Receptor sites for neurotransmitters are present on

• A. Membranes of synaptic vesicles
• B. Presynaptic membrane
• C. Tips of axons
• D. Postsynaptic membrane

Answer 1

The correct option is D

Postsynaptic membrane

The correct option is D.

Explanation of correct option:

1. Neurotransmitters refer to the chemical messengers that transfer necessary signals from a neuron to a target cell.
2. The specific receptor sites are found in the postsynaptic membrane.

Explanation of incorrect options:

Option A:

1. Neurotransmitters are present in the synaptic vesicles.
2. They are released into the synaptic cleft of the synapse by the process of exocytosis in which a vesicle fuses with the cell membrane of presynaptic neuron.

Option B:

1. The presynaptic membrane helps in releasing the neurotransmitter into the synaptic cleft.

Option C:

1. The axon is a long nerve cell process that assists in transmitting the electrical impulses away from the cell body.

Final answer: Receptor sites for neurotransmitters are present on postsynaptic membrane.