A patient has inflammation of the articular cartilage in the knee. What is the main function of this cartilage?
Correct answer: B. To reduce friction between joint surfaces
- A. To produce red blood cells
- B. To reduce friction between joint surfaces
- C. To attach muscle directly to bone
- D. To store calcium in the marrow
Explanation
Articular cartilage covers the ends of bones in synovial joints and provides a smooth, low-friction surface. It also helps absorb shock during movement. It does not produce blood cells, attach muscles, or serve as the main calcium store.
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About Skeletal and Muscular Systems
The skeletal and muscular systems include bone structure, joints, cartilage, the axial and appendicular skeleton, and the roles of ligaments and tendons. They also cover skeletal muscle organization, the sliding filament mechanism, neuromuscular contraction, and common differences between voluntary skeletal muscle, cardiac muscle and smooth muscle.
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