The A-band in a relaxed sarcomere is composed of only actin.
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Q63: When troponin and calcium combine,it causes actin
Q64: The difference between red and white fibers
Q65: The release of calcium by the sarcoplasmic
Q66: Because of the elasticity of the muscle
Q67: The sarcoplasmic reticulum in muscle cells is
Q69: T-tubules are formed by an inward extension
Q70: When the sarcomere contracts,the A-bands become smaller.
Q71: The motor end plate is part of
Q72: The sarcoplasmic reticulum continually pumps calcium ions
Q73: Myofibrils make up myofilaments.
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