What event triggers the release of neurotransmitters?
A) Calcium induces the fusion of synaptic vesicles with the presynaptic membrane.
B) Sodium induces the fusion of synaptic vesicles with the presynaptic membrane.
C) Potassium induces the fusion of synaptic vesicles with the presynaptic membrane.
D) Calcium activates enzymes that degrade synaptic vesicles.
E) Sodium activates enzymes that degrade synaptic vesicles.

Question

Quizplus · Accepted Answer

Calcium ions (Ca2+) play a crucial role in triggering the release of neurotransmitters at synapses. When an action potential reaches the presynaptic terminal, it causes voltage-gated calcium channels to open, allowing Ca2+ to enter the neuron. This influx of calcium ions induces the fusion of synaptic vesicles with the presynaptic membrane, leading to the release of neurotransmitters into the synaptic cleft.

What Event Triggers the Release of Neurotransmitters