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During the muscular contraction which of...

During the muscular contraction which of the following events occur? (a) H zone disappers (b) A band widens (c) T band reduces in width (d) Z line attached to actins are pulled inwards (e) Arachidonic acid has 16 carbon atoms. choose the correct answer from the options given below

A

(A), (B), (C), (D) only

B

(B), (C), (D), (E) only

C

(B), (D), (E), (A) only

D

(A), (C), (D), (E) only

Text Solution

Verified by Experts

The correct Answer is:
D
During muscle contraction, the cross bridges pull the thin filaments towards the centre of .A. band. The Z-line attached to the actins are also pulled inwards thereby causing a shortening of the sarcomere. The .I. bands get reduced, whereas the .A. bands retain the length. Myosin head acts as ATPase.
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