Question

1. please identify the component labeled by the letter \d\. a) i band b) h zone c) a band d) m line

Explanation:

In muscle - fiber structure, the A band is the dark - staining region that contains both thick and thin filaments overlapping in part. The component labeled "d" in a typical muscle - sarcomere diagram represents the A band. The I band contains only thin filaments, the H zone contains only thick filaments, and the M line is in the middle of the H zone.

Answer:

C. A band