Question

question 34
what does \a\ represent on the diagram?
○ myosin myofilament
○ actin myofilament
○ sarcomere
○ z disk
○ cross - bridge

Explanation:

In a sarcomere structure, the thin filaments are actin myofilaments. The structure labeled "A" in the diagram represents the thin - filament which is the actin myofilament. Myosin myofilaments are the thick filaments. The sarcomere is the entire contractile unit. The Z - disk is the boundary of the sarcomere. Cross - bridges are the projections from myosin that interact with actin during muscle contraction.

Answer:

Actin myofilament