Q. Which statement is correct for muscle contraction?
A) Length of H-zone is decreased
B) Length of A-band remains constant
C) Length of I-band gets increased
D) Length of two Z-line get increased
Explanation
During muscle contraction, actin and myosin interact to form actomyosin. According to sliding filament theory, cross bridge are formed by myosin filament to slide actin filament. During muscle contraction, length of A- band remains constant.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.