Question

required information
in a fully contracted sarcomere, the actin myofilaments
multiple choice
form a z disc
overlap
disappear
form the h zone

Explanation:

In a fully - contracted sarcomere, the thin actin myofilaments overlap completely due to the sliding of the filaments over the thick myosin filaments. The Z - discs come closer together, and the H - zone and I - band disappear. But the key event regarding actin myofilaments is their overlap.

Answer:

Overlap