Question : Discuss the role of Ca^(2+) ions in muscle contraction . Draw neat sketches to illustrate your answer .

Question : Discuss the role of Ca^(2+) ions in muscle contraction . Dr

1.	Question : Discuss the role of Ca^(2+) ions in muscle contraction . Draw neat sketches to illustrate your answer .
Answer» Solution :CALCIUM plays MAIN regulatory role in muscle contraction .It LINKS with troponin and changes its position and shape . It results in change of location and shape of tropomyosin .It opens functional site on F - actin molecule . Myosin cross bridge unites at this active site . Entire process can be explained with the help of following diagrams . Role of `Ca^(2+)` ions is in contraction and RELAXATION .Each head of myosin region have ENZYME myosit ATPase . It converts Atp into ADP + Pi in the presence of `Ca^(2+) and Mg^(2+)` ions .Energy obtained links myosin cross bridge with actin .