MUSCLE CONTRACTION AND MOLECULAR LEVEL

Paper - 1



Paper - 1

Muscle Contraction and Molecular Level

As Julia has just started a weight lifting program, it is important for her to know that due to lifting a dumbbell, various molecules get affected as her muscles contract. The stimulus for contraction is usually a nerve impulse that travels through the membrane of the muscle fibers, reaching the sarcoplasmic reticulum (a set of bags membranous cytoplasmic calcium where there is stored), which releases calcium ions from the cytoplasm. When contacting the myofibrils, unlocks the calcium binding sites of actin, allowing myosin to bind and thus initiating ...