Excitation-contraction coupling refers to: a) the chemical and electrical events
ID: 92823 • Letter: E
Question
Excitation-contraction coupling refers to:
a) the chemical and electrical events that trigger the mechanical events in a muscle fiber. b) the arrival of acetylcholine at the neuromuscular junction due to its exocytosis from the axon terminal. c) the enzymatic removal of acetylcholine from the synapse, which can then allow relaxation to occur. d) acetylcholine triggering the opening ion channels. e) the arrival of acetylcholine at the neuromuscular junction due to its exocytosis from the axon terminal and the enzymatic removal of acetylcholine from the synapse, which can then allow relaxation to occur.Explanation / Answer
a. the chemical and electrical events that trigger the mechanical events in a muscle fiber.
It refers to the generation of a action potential (nerve impulse) in the sarcolemma and the muscle begin to contract, by which action potential travels along the sarcolemma.
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