Locomotion and MovementHard
Question
Which statement is correct for muscle cortraction ?
Options
A.Length of H-zone decrease
B.Length of A-band remains constant
C.Length of I-band increases
D.Length of two Z-line increases
Solution
When Ca+ ions combine with troponin contraction of muscle initiates.
During contraction, the Z-lines come closer together and the sarcomere becomes shorter. The lengthe of A-band remains constant. I-bands shortens and H-zone narrows.
During contraction, the Z-lines come closer together and the sarcomere becomes shorter. The lengthe of A-band remains constant. I-bands shortens and H-zone narrows.
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