Question

2. Other than ATP, what muscle components are necessary for muscle contraction ExpOlain the role of each component below.

Answer 1

2 )Solution :

Apart from ATP, the muscle filaments such as actin, myosin, troponin, tropomysin, and calcium ions are involved in the muscle contraction .A sarcomere which is known to be a segment between two neighbouring , parallel z lines, these z lines are composed of a mixture of actin myofilaments and titin protein cross linked by alpha actinin. Then the actin myofilaments are comes contact with z lines,and myosin filaments are attached through titin molecules. The troponin is a complex of 3 regulatory protein that is integral to muscle contraction in skeletal and cardiac muscle, or any member of this complex. The long myofilaments of actin ,myosin, are held in myofibrils, and these are arranged into regions called sarcomere. During muscle contraction , the heads of myosin microfilaments quickly bind and release in a ratcheting fashion,pulling themselves along the actin myofilament.