The H-zone in the skeletal muscle fibre is due to

Options

A. the absence of myofibrils in the central portion of A-band
B. the central gap between myosin filaments in the A-band
C. the central gap between actin filaments extending through myosin filaments in the A-band
D. extension of myosin filaments in the central portion of the A-band

Answer

C

Explanation

H-zone in skeletal muscle is due to the central gap between actin filaments extending through myosin filaments in the A-band. Alternate arrangerance of dark and light bands gives the striated appearance to a skeletal muscle. At the centre of A-band a comparatively less dark zone called H-zone is present. In the of H-zone, M-line is present formed by the threats that connect the myofilaments.