In the Neuromuscular Junction, Once the Acetylcholine Receptor Has Bound

question 70

Multiple Choice

In the neuromuscular junction, once the acetylcholine receptor has bound acetylcholine on the postsynaptic muscle fiber, the permeability of the postsynaptic membrane to _______ increases.

• A) Ca²⁺ and AChE
• B) Na⁺ and K⁺
• C) Ca²⁺ and Na⁺
• D) Na⁺ only
• E) Cl^-

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