Textbook Question
The smooth muscle type found in the walls of digestive and urinary system organs and that exhibits gap junctions and pacemaker cells is:
a. Multi unit
b. Unitary
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9. Muscle Tissue
Structure of a Skeletal Muscle
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What term is used for the plasma membrane of a muscle fiber?
A
Sarcolemma
B
Endomysium
C
Perimysium
D
Epimysium
Verified step by step guidance1
Understand that the problem is asking for the specific term used to describe the plasma membrane of a muscle fiber.
Recall that a muscle fiber is a single muscle cell, and like all cells, it has a plasma membrane.
Identify that the term 'sarcolemma' is used specifically to refer to the plasma membrane of a muscle fiber.
Differentiate between the terms provided: 'endomysium', 'perimysium', and 'epimysium' are connective tissue layers surrounding muscle fibers and groups of fibers, not the plasma membrane itself.
Conclude that the correct term for the plasma membrane of a muscle fiber is 'sarcolemma'.
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