After a Muscle Cell Contracts,what Must Occur for the Muscle

question 58

Multiple Choice

After a muscle cell contracts,what must occur for the muscle to stop contracting?

• A)Calcium ions must be pumped back into the endoplasmic reticulum.
• B)Calcium ions must be pumped out of the muscle cell.
• C)Calcium ions must flow out of the endoplasmic reticulum.
• D)Calcium ions must flow into the muscle cell.
• E)Calcium ions must flow out of the muscle cell.

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