NEET 2017 · BiologyPrevious Year Question
Receptor sites for neurotransmitters are present on
Answer: (D) Post-synaptic membrane. Answer: (d) Post-synaptic membrane.
- A.Membranes of synaptic vesicles
- B.Pre-synaptic membrane
- C.Tips of axons
- D.Post-synaptic membrane✓
Correct Answer
(D) Post-synaptic membrane
Solution & Explanation
Answer: (d) Post-synaptic membrane. Solution: At a chemical synapse, the arriving impulse triggers release of neurotransmitters into the synaptic cleft. These released neurotransmitters bind to their specific receptors located on the post-synaptic membrane. This binding opens ion channels and generates a new (excitatory or inhibitory) potential in the post-synaptic neuron, so the receptor sites must be on the post-synaptic membrane. NCERT Reference: Ch 18, p.235, lines 03-05 — "released neurotransmitters bind to their specific receptors, present on the post-synaptic membrane"
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