Multiple Choice
In the context of exocytosis at a chemical synapse, where are neurotransmitters primarily stored in a presynaptic neuron before release?
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13. Intracellular Protein Transport
Exocytosis
Multiple Choice
In the context of exocytosis at a chemical synapse, where are neurotransmitters stored in a presynaptic neuron before they are released?
A
In the nucleus, packaged with chromatin until stimulation
B
In synaptic vesicles clustered near the presynaptic plasma membrane
C
In the smooth endoplasmic reticulum lumen until fusion with the postsynaptic membrane
D
In mitochondria, stored in the intermembrane space for rapid export
Verified step by step guidance1
Understand the process of exocytosis at a chemical synapse: it involves the release of neurotransmitters from the presynaptic neuron into the synaptic cleft.
Recall that neurotransmitters are synthesized in the neuron and need to be stored in a specialized compartment before release.
Identify the cellular structures involved in storing neurotransmitters: synaptic vesicles are small membrane-bound sacs located near the presynaptic plasma membrane.
Recognize that upon stimulation, these synaptic vesicles fuse with the presynaptic membrane to release neurotransmitters into the synaptic cleft.
Conclude that neurotransmitters are stored in synaptic vesicles clustered near the presynaptic plasma membrane before exocytosis occurs.
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