In order for a muscle to contract , which of the following events must occur ?


In order for a muscle to contract, which of the following events must occur? (A)Calcium ions (Ca++) must be released from the sarcoplasmic reticulum.

(B)Troponin must roll off the actin binding sites so cross bridges can form (C)ATP will attach to actin to cause tropomyosin to move off the myosin binding sites. (D)Acetylcholine causes the cross-bridges to release and the muscle to relax (E)Both B and D are correct
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Subject: Biology, Science

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