Which statement is correct for muscle contraction?

Options

A. Length of H-zone decrease
B. Length of A-band remains contant
C. Length of l-bond increases
D. Length of two Z-line increases

Answer

B

Explanation

When `Ca^(+)` ions combine with troponin then in conseqence muscle contraction will initiates.
During contraction, the Z-lines come closer together and the sarcomere becomes shorter. The length of A-band remains constant. I-bands shortens and H-zone narrwos.