In a neuromuscular junction,the effect of acetylcholine (ACh)binding to receptors on the motor end plate lasts only briefly due to
A)rapid uptake of the ACh into the myofiber.
B)endocytosis of the ACh receptor into the myofiber.
C)rapid destruction of ACh in the synaptic cleft by acetylcholinesterase.
D)rapid destruction of ACh in the synaptic cleft by monoamine oxidase.
E)diffusion of the ACh out of the synaptic cleft.

Question

Quizplus · Accepted Answer

The effect of ACh binding to receptors on the motor end plate lasts only briefly because it is rapidly destroyed in the synaptic cleft by acetylcholinesterase, which breaks it down into acetate and choline. This allows for precise control of muscle contraction and prevents overstimulation of the muscle.

In a Neuromuscular Junction,the Effect of Acetylcholine (ACh)binding to Receptors