Action potential propagation in a skeletal muscle fiber ceases when acetylcholine is removed from the synaptic cleft. Which of the following mechanisms ensures a rapid and efficient removal of acetylc?

The rapid and efficient removal of acetylcholine (ACh) from the synaptic cleft is primarily ensured by the enzyme acetylcholinesterase (AChE), which breaks down ACh into acetate and choline. This enzymatic action prevents prolonged stimulation of the muscle fiber, allowing for the cessation of action potential propagation. Additionally, the reuptake of choline into the presynaptic terminal also contributes to the recycling of ACh.