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ol motor nauron Ax potential (AP Axon terminal of the muscie tber 0 son terminal

ID: 57872 • Letter: O

Question

ol motor nauron Ax potential (AP Axon terminal of the muscie tber 0 son terminal of motor neuron open Cal- enters the xon teminal, moving down its containing ACh Cae entry causes ACh (a eurotransmitter) to be olds of ACh diffuses acrow the symaptic deft and binds to its rec eptors on the sarcolemma Sarcoplasm of ons pass out of the muscle fiber More Na" which produces a local change in the end plate potential ACh eftects are terminated by Degaded ACh -Ion channel closes ions cannot pass ase and funion awy from the junction

Explanation / Answer

Ach : neurotransmitter at neuromuscular junction Sarcolemma : membrane surrounding muscle fiber Junctional folds : portion of sarcolemma containing Ach receptors Ca2+ : ion triggering exocytosis