What are the boundaries of a sarcomere?
A)actin filaments
B)myosin filaments
C)cross-bridges
D)Z-lines

Question

Quizplus · Accepted Answer

The Z-lines mark the boundaries of a sarcomere in a muscle fiber. They are the areas where the thin actin filaments overlap with the thick myosin filaments, and are crucial in maintaining the structural integrity of the muscle fiber during contraction. The cross-bridges refer to the attachment points between the actin and myosin filaments within the sarcomere, while the actin and myosin filaments themselves are components of the sarcomere, but do not define its boundaries.

What Are the Boundaries of a Sarcomere