IGNOU LSE 5 2026 - Describe the structure of a nervous system synapse. What happens when

Question

Describe the structure of a nervous system synapse. What happens when an action potential reaches the synapse? Explain with suitable diagrams.

28 Jan 2026

Answer :

Word Count : 260

A synapse is the functional junction between two neurons or between a neuron and an effector cell such as a muscle or gland. Structurally, a typical chemical synapse consists of three main parts: the presynaptic terminal, the synaptic cleft, and the postsynaptic membrane. The presynaptic terminal is the expanded end of the axon, also called the synaptic

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