CanFitPro Personal Training Specialist Practice Test

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What feature do synovial joints have to reduce friction?

  1. Bony protrusions

  2. Cartilage along the surfaces where bones join

  3. Tight ligaments

  4. A high number of muscle attachments

The correct answer is: Cartilage along the surfaces where bones join

Synovial joints have a liquid-filled synovial cavity with smooth articular cartilage, which allows for smooth and gliding movement between the bones. Bony protrusions, while sometimes involved in joint movement, are not specifically designed to reduce friction. Tight ligaments help stabilize the joint, but they do not directly reduce friction. A high number of muscle attachments also do not directly reduce friction, as muscle attachments are involved in movement rather than friction reduction. Therefore, the feature that synovial joints have to reduce friction is cartilage along the surfaces where bones join.

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