Question

If a muscle undergoes rapid contraction and relaxation, the sarcoplasmic reticulum extension

• A. Requires constant plugging in and out of $C{a}^{2+}$
• B. Rapid synthesis of myosin
• C. Does not require energy
• D. All of these

Answer 1

The correct option is A Requires constant plugging in and out of $C{a}^{2+}$

If a muscle undergoes rapid contraction and relaxation, the sarcoplasmic reticulum extension requires constant plugging in and out of Ca$2+$.

So the correct answer is option A.