Acetylcholine

question 73

Multiple Choice

Acetylcholine

• A)opens voltage-gated Na+ channels in skeletal muscle fibers, which causes depolarization of the muscle fibers
• B)may decrease the permeability of the motor end plate to Na+ and K+ when combined with the receptor sites on the motor end plate
• C)always depolarizes skeletal muscle fibers and postganglionic neurons
• D)does both a and b
• E)does both b and c

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