The energy costs of muscle contraction are high. Which of the following contribu

Question

The energy costs of muscle contraction are high. Which of the following contributes significantly to the overall cost of muscle contraction in skeletal muscle cells?

A.ATP hydrolyzed by tropomyosin during contraction B.ATP hydrolyzed by the voltage-gated calcium channels in the membrane of the T-tubule just before contraction occurs C.ATP hydrolyzed by the calcium release channels in the membrane of the sarcoplasmic reticulum as contraction is triggered D.ATP hydrolyzed by troponin as it triggers muscle contraction E.ATP hydrolyzed by calcium ATPase pumps that transport calcium ions back into the sarcoplasmic reticulum after contraction

Explanation / Answer

E. ATP hydrolyzed by calcium ATPase pumps that transport calcium ions back into the sarcoplasmic reticulum after contraction this stpes cost a high energy

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