Pharmacology How would a drug that competes with ACh for receptors at the motor end plate affect skeletal muscle? It would: A Produce uncontrolled muscle spasms B Cause the muscles to contract and be unable to relax C Cause muscles to relax and be unable to contract D Make the muscles more excitable 💡 Explanation How would a drug that competes with ACh for receptors at the motor end plate affect skeletal muscle? It would: ✓ Correct Answer: C. Cause muscles to relax and be unable to contract