Question

During muscular contraction which of the following events occur? iH-zone eliminated iiA band widens iiiI band reduces in width ivWidth of A band is unaffected v M-line&Z-line come closer (1)i,ii,iv and v (2)Only i,il and v (3)Only ii,iv and v (4)Only i,ii and ii

Answer 1

Answer:

( i ) , ( iii ) and ( iv ) are correct

Explanation:

During muscle contraction :-

1 . H - zone disappear or eliminated

2 . l - band reduces or shortens in width

3. A - band remains constant that is no effect on A - band

Because muscle contraction is brought about by sliding of actin filament over myosin filament