Q165 / 200 · NEET 2022 (Phase 2) · Zoology

According to the sliding filament theory:

  • A
    Actin and myosin filaments slide over each other to increase the length of the sarcomere.
  • Correct answer
    B
    Length of A-band does not change.
  • C
    I-band increases in length
  • D
    The actin filaments slide away from A-band resulting in shortening of sarcomere.

Solution

According to Sliding filament theory, thin. Filament slide over Thick filament (mainly myosin). That is why the length of $\mathrm{A}$ band does not change as A band is made up of thick filament.

Hence, the correct answer is option: 'B'.

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