A sarcomere is best described as a
A) moveable structural unit within a myofibril bounded by H zones.
B) fixed structural unit within a myofibril bounded by Z lines.
C) fixed structural unit within a myofibril bounded by A bands.
D) moveable structural unit within a myofibril bounded by Z lines.
E) collection of myofibrils.

Question

Quizplus · Accepted Answer

A sarcomere is a moveable structural unit within a myofibril bounded by Z lines. The Z lines mark the ends of the sarcomere and the length of the sarcomere determines the length of the myofibril.

A Sarcomere Is Best Described as a