The long strands of protein running the length of a muscle fiber are called
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 called myofibrils. Sarcomeres are the repeating units that make up myofibrils, Z lines are the boundaries of sarcomeres, and troponins are proteins involved in muscle contraction.

The Long Strands of Protein Running the Length of a Muscle