The arrival of a nerve impulse at the myoneural junction initially causes a release of _____________ from the presynaptic ending.

Question

Quizplus · Accepted Answer

The release of acetylcholine from the presynaptic ending is essential for the transmission of the nerve impulse across the myoneural junction. The acetylcholine diffuses across the synaptic cleft and binds to the receptor sites on the postsynaptic membrane, causing a depolarization of the muscle fiber and ultimately leading to muscle contraction.

The Arrival of a Nerve Impulse at the Myoneural Junction