The figure shows an axon terminal and… - NEET UG 2013 Zoology PYQ

NEET UG 2013 — Zoology Neural Control and Coordination

2013mcqeasy

The figure shows an axon terminal and synapse. Select the option giving correct identification of labels $a-d$ . NEET 2013 Zoology, Neural Control and Coordination — question figure

Official previous-year question

Held on 30 Apr 2013 · Verified 9 Jul 2026.

Options

A
a-Action potential, c - Neurotransmitter
B
b- Neurotransmitter, d - Receptor capsules
C
c - Receptor, d - Synaptic vesicles
D
a - Axon terminal, b - Serotonin complex

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Solution

NEET 2013 Zoology, Neural Control and Coordination — solution figure

Related Theory A nerve impulse is transmitted from one neuron to another through junctions called synapses. A synapse is formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron, which may or may not be separated by a gap called synaptic clefi. At electrical synapses, the membranes of pre-and posi-synaptic neurons are in very close proximity. Electrical current can flow directly from one neuron into the other across these synapses. Impulse transmission across an electrical synapse is always faster than that across a chemical synapse.

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