Question

which of the following contains overlapping thick and thin filaments?
multiple choice
a band
h band
i band
m line
z discs

Explanation:

• A band: The A band contains overlapping thick (myosin) and thin (actin) filaments.
• H band: Contains only thick filaments.
• I band: Contains only thin filaments.
• M line: A structure in the middle of the A band, mainly for anchoring thick filaments.
• Z discs: Mark the boundaries of a sarcomere and anchor thin filaments.

Answer:

A. A band