Which term is given to the unit of a myofi bril that contracts? A. sarcoplasm B. sarcomere C. sarcolemma D. sarcoplasmic reticulum
Option B.Sarcomere is the contractile unit of a myofibril in striated muscle. The sarcomeres are joined stop to cease to shape a myofibril. Each sarcomere consists of a Z-line at both give up, to which the actin filaments are attached
