Calcium is important in skeletal muscle contr | vedclass

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(B) During skeletal muscle contraction,the binding of $Ca^{2+}$ ions to the $Troponin$ complex is a critical step.In a relaxed state,the active sites

Vedclass · Accepted Answer

Binds to troponin to remove the masking of active sites on actin.

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(B) During skeletal muscle contraction,the binding of $Ca^{2+}$ ions to the $Troponin$ complex is a critical step.In a relaxed state,the active sites on the actin filament are masked by the $Tropomyosin$ protein.When $Ca^{2+}$ ions are released from the sarcoplasmic reticulum,they bind to $Troponin$.This binding causes a conformational change in the $Troponin-Tropomyosin$ complex,which shifts the $Tropomyosin$ away from the active sites on the actin filament.This exposure allows the myosin heads to bind to the actin,forming cross-bridges and initiating muscle contraction.

Calcium is important in skeletal muscle contraction because it

Similar Questions

The sliding filament theory can be best explained as:

Relaxation of the muscle takes place due to
$I.$ Pumping of $Ca^{2+}$ ions into the sarcoplasmic reticulum
$II.$ Presence of $ATP$
$III.$ Conformational changes in troponin and masking of the actin filament
Which of the following options contains the correct statements?

What are the characteristic features of skeletal muscles?

Explain sarcolemma.

What is muscle fatigue?

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