Question

mechanism of contractions of mussule

Answer 1

The mechanism of muscle contraction. ... Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.

Answer 2

Pura padhna...

vrna isme tera ghata mera kuch nhi jaata..

:)

Calcium is released from the sarcoplasmic reticulum at the time of muscle contraction ....

This calcium binds with Stark troponin I tropomyosin Complex on the actin filament molecules

the complex shifts and the myosin binding sites on actin filaments are exposed ...

Myosin head have actin binding sites as well as ATP sites..

Myosin head binds with the actin filaments and hydrolysis of ATP takes place that pushes the thin actin over the thick myosin filament ...

The thin filaments slide over the thick filament according to sliding filament theory...

#Khushi here