Practice Quiz

NPTE Physical Therapist Exam Review

Category - Physical Therapy

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Which muscular structure surrounds the actual muscle fiber and is responsible for depolarization of the surface of the fiber and protection and insulation of the fiber from others around it?
  1. Satellite cells
  2. Sarcoplasm
  3. Fascia
  4. Sarcolemma
Explanation
Answer: D - The sarcolemma is responsible for depolarization of the surface of the fiber and protection and insulation of the fiber from others around it. The sarcolemma is a thin membrane that connects with the endomysium and contains structures that are important for internal functions and growth.
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