A(n)_______________ diffuses across a narrow synaptic cleft between the presynaptic axon and the postsynaptic cell to transmit a nerve impulse. A)neurotransmitter B)electrical impulse C)Na⁺ ion D)vesicle E)action potential

Question

Quizplus · Accepted Answer

Neurotransmitters are chemical messengers that transmit signals across the synaptic cleft between two neurons or between a neuron and an effector cell, such as a muscle or gland. They diffuse from the presynaptic terminal into the synaptic cleft, where they bind to receptors on the postsynaptic membrane, triggering changes in ion channels and generating a new electrical signal in the postsynaptic neuron.

A(n)_______________ Diffuses Across a Narrow Synaptic Cleft Between the Presynaptic