Question

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

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

Answer 1

Answer: (B)

Central part of thick filament, not overlapped by thin filaments is called the ‘H’ zone. ‘H’ zone is also called Hensen’s Line.