During muscle contraction, myosin cross bridges attach to which active sites?
A) Z discs
B) actin filaments
C) myosin filaments
D) thick filaments
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The major function of the sarcoplasmic reticulum in muscle contraction is to ________.
A) make and store phosphocreatine
B) provide a source of myosin for the contraction process
C) synthesize actin and myosin myofilaments
D) regulate intracellular calcium concentration
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What is the primary function of wave summation?
A) prevent muscle fatigue
B) prevent muscle relaxation
C) increase muscle tension
D) produce smooth, continuous muscle contraction
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Creatine phosphate functions in the muscle cell by ________.
A) inducing a conformational change in the myofilaments
B) forming a temporary chemical compound with myosin
C) storing energy that will be transferred to ADP to resynthesize ATP
D) forming a chemical compound with actin
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