Question

what are responsible for contraction and relaxation in muscles

Answer 1

heya buddy ur answer is:
Muscle relaxation occurs when calcium is pumped back into the sarcoplasmic reticulum, away from the actin and myosin. When calcium moves in this way, the actin and myosin cannot interact, and the muscle relaxes.
thanq

Answer 2

create the force responsible formuscle contraction. When the signal to contract is sent along a nerve to themuscle, the actin and myosin are activated. Myosin works as a motor, hydrolyzing adenosine triphosphate (ATP) to release energy in such a way that a myosin filament moves along an actin…