Multiple Choice
In the structure of a skeletal muscle, individual muscle fibers are arranged in bundles called what?
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9. Muscle Tissue
Structure of a Skeletal Muscle
Multiple Choice
In the structure of a skeletal muscle fiber, what is the name of the plasma membrane of the muscle fiber?
A
Endomysium
B
Sarcoplasm
C
Myofibril
D
Sarcolemma
Verified step by step guidance1
Step 1: Understand the components of a skeletal muscle fiber. A skeletal muscle fiber is a single muscle cell that contains various structures including the plasma membrane, cytoplasm, and contractile elements.
Step 2: Identify the plasma membrane of the muscle fiber. In muscle cells, the plasma membrane is specialized and has a specific name different from typical cell membranes.
Step 3: Recall the terminology: the plasma membrane of a skeletal muscle fiber is called the 'sarcolemma'. This membrane surrounds the muscle fiber and plays a key role in conducting electrical signals.
Step 4: Differentiate the other options: 'Endomysium' is connective tissue surrounding individual muscle fibers, 'Sarcoplasm' is the cytoplasm inside the muscle fiber, and 'Myofibril' refers to the contractile elements inside the muscle fiber.
Step 5: Conclude that the correct term for the plasma membrane of a skeletal muscle fiber is 'sarcolemma'.
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