Excitation-contraction coupling refers to a) the chemical and electrical events
ID: 92824 • 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
Excitation contraction coupling reaction :
This can be defined as a reaction in which there is conversion of the electrical stimulus into a response that is mechanical. This occurs as a transduction between the generation of muscle contractions and generation of action potential in the sarcolemma. This generation of action potential to generate muscle cell contraction is regulated by calcium ions.
Thus the answer in option A.
a) the chemical and electrical events that trigger the mechanical events in a muscle fiber.
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