What is the primary function of articular cartilage in synovial joints?
To produce synovial fluid
To connect bones
To absorb shock and reduce friction
To facilitate nerve signaling
The Correct Answer is C
A. To produce synovial fluid: Synovial fluid is produced by the synovial membrane (lining of the joint capsule), not by the articular cartilage.
B. To connect bones: Structural connections between bones are provided by ligaments rather than articular cartilage.
C. To absorb shock and reduce friction: Articular cartilage provides a smooth, resilient surface that distributes load and reduces friction between joint surfaces during movement.
D. To facilitate nerve signaling: Articular cartilage is avascular and largely aneural, so it does not play a direct role in nerve signaling.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Sebaceous gland: Sebaceous glands secrete sebum (an oily substance) that lubricates and waterproofs skin and hair.
B. Apocrine gland:Apocrine glands produce a protein-rich sweat (body odor after bacterial action), found in axilla/groin; not the primary source of sebum.
C. Eccrine gland: Eccrine glands produce watery sweat for thermoregulation distributed over much of the body.
D. Ceruminous gland: Ceruminous glands are modified sweat glands in the ear canal that produce cerumen (earwax), not sebum for hair/skin lubrication.
Correct Answer is C
Explanation
A. Absorb calcium for bone strength:Articular cartilage does not absorb calcium for bone strength; bone mineralization occurs within bone matrix, not articular cartilage.
B. Anchor ligaments:Ligaments attach near bone and into periosteum; anchoring is not the main function of articular cartilage.
C. Provide frictionless movement between bones:Articular cartilage provides a smooth, low-friction surface and helps distribute loads to permit painless joint movement.
D. Connect muscles to bones:Tendons connect muscles to bones; articular cartilage does not serve this role.
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