If a nerve impulse arrives at the neuromuscular junction of a muscle fiber, and acetylcholinesterase is completely inhibited, which consequence follows, affecting the muscle's ability to contract?

💡 Explanation

If acetylcholinesterase is inhibited, acetylcholine will continue to stimulate the muscle fiber, causing continuous depolarization and calcium release; this leads to prolonged muscle fiber stimulation, because the signal to relax is absent. Therefore, prolonged stimulation results, rather than reduced calcium or halted ATP hydrolysis.

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