Multiple Choice
Which of the following is not a structure of the sarcomere?
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15. Cytoskeleton and Cell Movement
Muscle Contractions
Multiple Choice
In skeletal muscle physiology, the cell membrane of a muscle fiber is called the:
A
Sarcoplasmic reticulum
B
Z disc
C
Sarcolemma
D
Endomysium
Verified step by step guidance1
Understand that the question asks for the name of the cell membrane specifically in a skeletal muscle fiber.
Recall that in skeletal muscle physiology, the cell membrane surrounding each muscle fiber (muscle cell) has a special name different from the typical plasma membrane.
Identify the options: Sarcoplasmic reticulum is an organelle involved in calcium storage, Z disc is a structural component within the muscle fiber, Endomysium is connective tissue surrounding muscle fibers, and Sarcolemma is the specialized cell membrane of the muscle fiber.
Recognize that the sarcolemma functions as the plasma membrane of the muscle cell, playing a key role in conducting electrical signals and maintaining the cell's integrity.
Conclude that the correct term for the muscle fiber's cell membrane is 'Sarcolemma'.
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