1. Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine. 2. Acetylcholine is removed by acetylcholinesterase. 3. Acetylcholine binds to receptors and depolarizes the postsynaptic membrane. 4. Axon terminal depolarizes.

Question: Which of the following is the correct order of events that occur at a cholinergic synapse?

Answer: The correct order of events that occurs in the cholinergic synapse is 4,1,3,2

Explanation:

cholinergic synapse are distributed all over the body and they aid in transmitting electrical signals from one cell to another. Acetylcholine is used as the neurotransmitter. This can be from a muscle cell to a nerve cell or from nerve cell to nerve cell. The series of events that takes place at this synapse includes the following steps:

- Axon terminal depolarizes.

- Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine

- Acetylcholine binds to receptors and depolarizes the postsynaptic membrane

- Acetylcholine is removed by acetylcholinesterase.