Question

the correct sequence of events during relaxation of muscle is

Answer 1

The C option is correct.

Explanation:

Correct sequence of event is:

• Ca returned to SR

• Cross bridges are broken

• Inactivation of actin

Further explanation:

Relaxation occurs when stimulus of the nerve ends. Calcium is then pumped back into the sarcoplasmic reticulum breaching the link between actin and myosin. Actin and myosin return to their inactive state resulting the muscle to relax.

Hope it helped.....

Answer 2

Muscle relaxation is the complementary process of muscle contraction.

Option C

Explanation:

• During the contraction of the muscle, the calcium ions are released into the sarcoplasm, attachment of which with the troponin causes the muscle contraction to initiate.
• During the relaxation, the calcium ions are pumped back into the sarcoplasmic reticulum, this leads to the lessening of the calcium ion concentration in the sarcoplasm.
• This leads to detachment of the myosin with the actin and covering of the site troponin.
• This marks the returning of the muscle to a relaxed position.

To learn more about muscle contraction:

Explain mechanism of muscle contraction..briefly

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Process of muscle contraction

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