A sarcomere is best described as ________
A) a part of the sarcoplasmic reticulum
B) a group of fascicles
C) a group of myofibrils
D) a unit within a myofibril
E) All of the choices are correct.

Question

Quizplus · Accepted Answer

A sarcomere is the functional unit within a myofibril, consisting of actin and myosin filaments and responsible for muscle contraction. It is not part of the sarcoplasmic reticulum, not a group of fascicles, and not a group of myofibrils. Therefore, choices A, B, and C are incorrect.

A Sarcomere Is Best Described as ________