What structure runs from Z line to Z line?

Name: What structure runs from Z line to Z line?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The sarcomere is the basic unit of muscle contraction and runs from Z line to Z line, defining the boundaries of the functional contractile unit within myofibrils. A bands and I bands are components of the sarcomere, but do not run the full length between Z lines. Myofibrils are composed of many sarcomeres aligned end-to-end, and do not run from Z line to Z line on their own.

What Structure Runs from Z Line to Z Line