Question

when a skeletal muscle fiber contracts, the

h bands and i bands get larger.
width of the a band increases.
zones of overlap get larger.
z lines move further apart.
all of the answers are correct.

Explanation:

When a skeletal muscle fiber contracts, the thin - actin filaments slide over the thick - myosin filaments. The A band remains the same width as it represents the length of the myosin filaments. The H bands and I bands decrease in size as the zones of overlap between actin and myosin increase. The Z lines move closer together.

Answer:

zones of overlap get larger.