Posted: July 16th, 2016
During the contraction phase of a muscle twitch, A. acetylcholine stimulates the pre-synaptic terminal. B. sodium ions diffuse into the muscle fiber. C. actin-myosin cross-bridges form. D. calcium ions are transported back to the sarcoplasmic reticulum. E. the action potential travels down the T tubule.
During contraction phase of a muscle twitch, A. acetylcholine stimulates the pre-synaptic terminal. B. sodium ions diffuse into the muscle fiber. C. actin-myosin cross-bridges form. D. calcium ions are transported back to the sarcoplasmic reticulum. E. the action potential travels down the T tubule.
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