Questions: Within a sarcomere, the region within the A band that lacks thin filaments is called the band.

Within a sarcomere, the region within the A band that lacks thin filaments is called the band.
Transcript text: Within a sarcomere, the region within the $A$ band that lacks thin filaments is called the band.
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Solution

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The answer is the H zone.

Explanation:

  • The A band is the region of a sarcomere that contains the entire length of the thick filaments (myosin).
  • Within the A band, there is a region that lacks thin filaments (actin), and this region is known as the H zone.
  • The H zone is visible when the muscle is relaxed and is reduced or disappears when the muscle contracts, as the thin filaments slide over the thick filaments.
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