What happens when a neurotransmitter is released by a presynaptic cell?
A) It causes calcium to rush into the presynaptic neuron.
B) It causes calcium to rush into the postsynaptic neuron.
C) The neurotransmitter passively spreads across the synaptic cleft.
D) The neurotransmitter is actively transported across the synaptic cleft.

Question

Quizplus · Accepted Answer

The neurotransmitter is released into the synaptic cleft and then diffuses across to the postsynaptic neuron. This process is passive, relying on the concentration gradient of the neurotransmitter molecules.

What Happens When a Neurotransmitter Is Released by a Presynaptic