In which condition does relaxation occur in m | vedclass

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Question

(A) Relaxation occurs when $Ca^{++}$ ions are pumped back into the sarcoplasmic reticulum,resulting in the masking of actin filaments. As the $Ca^{++}

Vedclass · Accepted Answer

When $Ca^{++}$ ions are pumped back into the sarcoplasmic reticulum.

Vedclass · Answer

(A) Relaxation occurs when $Ca^{++}$ ions are pumped back into the sarcoplasmic reticulum,resulting in the masking of actin filaments. As the $Ca^{++}$ concentration decreases,the troponin-tropomyosin complex returns to its original position,covering the active sites on the actin filament. This prevents the formation of cross-bridges,allowing the muscle fiber to return to its original state (relaxation) and the '$Z$' lines to return to their original position.

In which condition does relaxation occur in muscles?

Similar Questions

The actin filament is shown below. Where does $Ca^{++}$ bind during muscle contraction?

Choose the correct option for the following:
Biceps $\quad$ Iris $\quad$ Heart

Stimulation of a muscle fiber by a motor neuron occurs at

$A$ sarcomere consists of

Assertion : The phase of muscle contraction occurs when myosin binds and releases actin.
Reason : Muscle contraction is initiated by a signal sent by the peripheral nervous system via motor neuron.

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