The long strands of protein running the length of a muscle fiber are known as
A) sarcomeres.
B) myofibrils.
C) Z lines.
D) troponins.

Question

Quizplus · Accepted Answer

The long strands of protein running the length of a muscle fiber are known as myofibrils. Sarcomeres are the basic contractile units of a muscle fiber, Z lines mark the boundaries of sarcomeres, and troponins are proteins involved in muscle contraction.

The Long Strands of Protein Running the Length of a Muscle