ATP-driven pumps will move Ca ++<span> out of the sarcoplasm back into the SR. This results in the “reshielding” of the </span>actin<span>-binding sites on the thin filaments. Without the ability to form cross-bridges between the thin and thick filaments, the </span>muscle<span>fiber loses its tension and relaxes.</span>
It aside A
B is WRONG because at the end it says per day and its per minute
Answer:
IT HAS 4 CHAMBERS THAT PUMP BLOOD, 2 ONE THE RIGHT AND 2 ON THE LEFT
Explanation:
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