Which statement is correct for muscle contraction?

Question

Which statement is correct for muscle contraction? (A) Length of A-band decrease (B) Length of 1-band remain constant (C) Length of two Z-line increases (D) Length of H-zone decreases

Tardigrade Admin · Accepted Answer

When a muscle fibre is contracted its A-band remain intact and 1-band shortens. H-zone also disappear as the actin filaments of both sides in each sarcomere may overlap each other at M-line.

Q. Which statement is correct for muscle contraction?

Length of A-band decrease

Length of 1-band remain constant

Length of two Z-line increases

Length of H-zone decreases

When a muscle fibre is contracted its A-band remain intact and 1-band shortens. H-zone also disappear as the actin filaments of both sides in each sarcomere may overlap each other at M-line.