If a muscle cell expressed muscarinic ACh channels, which are only permeable to Na+ instead of nicotinic ACh channels, which are permeable to both Na+ and K+, which portion of a muscle cell would be inhibited?
A. Relaxation
B. Muscle cell depolarization
C. Cross-bridge cycling
D. Neurotransmitter release from the motor neuron
E. None of the answer choices are correct
Answer: E
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