Which of the following is a series of contractile units that make up each myofibril (each unit extends from Z line to Z line)?
A)Sarcomeres
B)Synapses
C)Fascicles
D)Sarcoplasmic reticulum

Question

Quizplus · Accepted Answer

Sarcomeres are the contractile units of skeletal muscles and they extend from Z line to Z line. They are composed of thin and thick filaments that interact to produce muscle contraction. Synapses are the junctions between nerve cells, while fascicles are groups of muscle fibers bundled together. The sarcoplasmic reticulum is a specialized form of endoplasmic reticulum found in muscle cells that stores and releases calcium ions for muscle contraction.

Which of the Following Is a Series of Contractile Units