Question

which specific region of the sarcomere contains only thick filaments? a.) z - line b.) m - line c.) a - band d.) h - zone

Explanation:

• Z - line: It is the boundary of the sarcomere and is made of proteins that anchor thin filaments. It does not contain thick filaments.
• M - line: It is in the center of the sarcomere and contains proteins that hold thick filaments together. But it is not a region that is composed solely of thick filaments.
• A - band: It contains both thick and thin filaments (in the overlapping region).
• H - zone: This is the region within the A - band that contains only thick filaments.

Answer:

d. H - zone