A myofibril may be thought of as many of these joined end-to-end.
A) sarcolemmas
B) ribosomes
C) sarcomeres
D) muscle fibers
E) Z lines

Question

Quizplus · Accepted Answer

A myofibril is composed of repeating units called sarcomeres, which are joined end-to-end to make the entire myofibril. Sarcomeres contain thick and thin filaments that slide past each other during muscle contraction, resulting in the shortening of the sarcomere and therefore the myofibril. Sarcomeres are separated from each other by Z lines. Sarcolemmas refer to the cell membranes of muscle fibers, and ribosomes are cellular structures involved in protein synthesis.

A Myofibril May Be Thought of as Many of These