問題詳情
40.What is the function of calcium ions in muscle contraction?
(A)They cause actin and myosin filaments to shorten.
(B) They make membranes permeable.
(C)They allow cross-bridges to form between actin and myosin.
(D) They increase the action potential of the fiber.
(E)They decrease the action potential of the fiber.
(A)They cause actin and myosin filaments to shorten.
(B) They make membranes permeable.
(C)They allow cross-bridges to form between actin and myosin.
(D) They increase the action potential of the fiber.
(E)They decrease the action potential of the fiber.
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