A skeletal muscle fiber has many threadlike contractile elements in the sarcoplasm.These elements are called
A) myofibers
B) myofilaments
C) sarcoplasmic reticulum
D) cytoskeleton
E) striations

Question

Quizplus · Accepted Answer

Myofilaments are the threadlike contractile elements found in the sarcoplasm of a skeletal muscle fiber. They consist of two types of filaments: thick filaments made up of myosin and thin filaments made up of actin. Together, these filaments create the sliding mechanism responsible for muscle contraction.

A Skeletal Muscle Fiber Has Many Threadlike Contractile Elements in the Sarcoplasm.These