What Happens When Acetylcholine Stimulates Its Receptors in the Neuromuscular

Multiple Choice

What happens when acetylcholine stimulates its receptors in the neuromuscular junction?

A) The release of Ca²⁺ from the sarcoplasmic reticulum decreases.
B) The permeability of the sarcolemma to Na⁺ increases.
C) The positive charge on the sarcolemma decreases.
D) The threshold of the muscle fiber lowers.
E) The inhibitory effect of acetylcholinesterase is overridden.