Question

question 1
what does \e\ represent on the diagram?
○ myosin myofilament
○ actin myofilament
○ sarcomere
○ z disk
○ cross - bridge

Explanation:

In muscle - structure diagrams, a sarcomere is the basic contractile unit of a muscle fiber. It is the region between two Z - disks. The structure labeled "E" encompasses the area from one Z - disk to the next, which is characteristic of a sarcomere. Myosin and actin are the proteins that make up the myofilaments within the sarcomere. Cross - bridges are the interactions between myosin and actin during muscle contraction.

Answer:

Sarcomere