Examine the structure of a muscle cell in the accompanying figure.Which one of the following statements about muscle structure is TRUE?
A) Each muscle cell has one nucleus.
B) Each myofibril consists of many muscle cells.
C) Each muscle cell has one sarcomere.
D) A sarcomere contains thick and thin filaments.

Question

Examine the structure of a muscle cell in the accompanying figure.Which one of the following statements about muscle structure is TRUE? 
A) Each muscle cell has one nucleus. 
B) Each myofibril consists of many muscle cells. 
C) Each muscle cell has one sarcomere. 
D) A sarcomere contains thick and thin filaments.

Quizplus · Accepted Answer

The figure shows the structure of a muscle cell, with a clear depiction of the sarcomere, which is the basic unit of muscle contraction. Within the sarcomere, there are thick and thin filaments responsible for generating force. Choice A is incorrect because muscle cells are multinucleated. Choice B is incorrect because myofibrils consist of many sarcomeres, not muscle cells. Choice C is incorrect because each sarcomere is part of a muscle cell, but a muscle cell contains multiple sarcomeres.

Examine the Structure of a Muscle Cell in the Accompanying