Question

The cell membrane of a muscle ber is called a ________. a. myobril b. sarcolemma c. sarcoplasm d. myolament

Short answer

Answer: The correct term that refers to the cell membrane of a muscle fiber is the sarcolemma. This specialized cell membrane plays a crucial role in regulating ion and nutrient exchange, as well as electrical impulses needed for muscle contraction.

Step-by-step solution

Review the terminologies

Familiarize with the following terms: - Myobril refers to elongated contractile threads found in muscle cells. - Sarcolemma is the fine, transparent tubular sheath that envelops the fibers of muscular tissues. - Sarcoplasm is the cytoplasm of muscle cells. - Myofilament refers to the filaments of myofibrils, constructed from proteins, principally myosin or actin.

Choose the correct term

The cell membrane of a muscle fiber is called the sarcolemma. Therefore, the correct answer is (b) sarcolemma.

Brief explanation

The sarcolemma is the specialized cell membrane surrounding muscle fibers. It plays an essential role in the regulation of ions and nutrient exchange, as well as electrical impulses that are necessary for muscle contraction.