Part B Excitation of the sarcolemma is coupled or linked to the contraction of a skeletal muscle fiber. What specific event initiates the contraction? View Available Hint(s) Action potentials propagate into the interior of the skeletal muscle fiber. Sodium release from the sarcoplasmic reticulum initiates the contraction. Calcium release from the sarcoplasmic reticulum initiates the contraction. Voltage-sensitive proteins change shape. Submit Part C
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Excitation of the sarcolemma: This refers to the depolarization of the sarcolemma (cell membrane) of a skeletal muscle fiber, which occurs when an action potential is generated. Show more…
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