Question

multiple choice question
within a sarcomere, the region within the a band that lacks thin filaments is called the

o z line
o i band
o m line
o h zone

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Explanation:

In a sarcomere, the A - band contains both thick and thin filaments. The H - zone is the region within the A - band where there are no thin filaments. The Z - line is the boundary of the sarcomere. The I - band contains only thin filaments. The M - line is in the middle of the A - band and is related to the organization of thick filaments.

Answer:

D. H zone