試題詳解

53. Calcium ion initiates skeletal muscle contraction by:
(A) breaking the actin-myosin cross-bridges
(B) transmitting action potentials across the neuromuscular junction
(C) spreading action potentials through the T tubules
(D) initiating ATP generation
(E) binding to the troponin complex that subsequently displaces tropomyosin from the myosin binding sites