The major function of the sarcoplasmic reticulum in muscle contraction is to ________.

The major function of the sarcoplasmic reticulum in muscle contraction is to ________. 



A) make and store phosphocreatine
B) synthesize actin and myosin myofilaments
C) provide a source of myosin for the contraction process
D) regulate intracellular calcium concentration





Answer: D


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