What flows across the synaptic cleft?
A)Sodium ions
B)Electrons
C)A neurotransmitter
D)Potassium ions

Question

Quizplus · Accepted Answer

The synaptic cleft is the small gap between the presynaptic neuron and the postsynaptic neuron. When an action potential reaches the end of the presynaptic neuron, it triggers the release of neurotransmitters into the synaptic cleft. These neurotransmitters then bind to receptor proteins on the postsynaptic neuron, allowing for the transmission of the signal across the synapse. Sodium and potassium ions are involved in the action potential and do not directly cross the synaptic cleft. Electrons are not involved in neural communication. Thus, the best choice is C, which accurately describes the flow of neurotransmitters across the synaptic cleft.

What Flows Across the Synaptic Cleft