Question

write the mechanism of muscle relaxation​

Answer 1

Answer:

Mechanism of Muscle Relaxation :

• The muscles contract when acetylcholine binds to the acetylcholine receptors which are present on the sacrolemma.
• On destruction of acetylcholine from the membrane bound receptors, the contracted muscles will again relax.
• Destruction of acetylcholine is done by an enzyme called as acetylcholinesterase which breaks acetylcholine into acetic acid and choline.
• Due to the destruction of acetylcholine the muscles come back in relaxed state.
• During muscle contraction the sacroplasmic reticulum will release the calcium stored in the sacroplasm.
• For muscle relaxation the Ca2+ ions from the sacroplasm are taken back into the sacroplasmic reticulum by a protein called as calsequestrin.

Answer 2

Answer:

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. Current biochemical studies suggest that the myosin cross-bridge exists in two main conformations.