Myosin head separates from actin when:

Flexion of the thigh,knee,and their rotation is facilitated by:

During muscular contraction,which of the following events occur?
$(a)$ $'H'$ zone disappears
$(b)$ $'A'$ band widens
$(c)$ $'I'$ band reduces in width
$(d)$ Myosin hydrolyzes $ATP$,releasing the $ADP$ and $\Pi$
$(e)$ $Z$-lines attached to actins are pulled inwards
Choose the correct answer from the options given below.

Describe the mechanism of muscle contraction with a diagram.

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

Myofilaments or myofibrils are