Round 12: Tossup 11

Note to moderator: Read the answerline carefully. Damage to three structures in this body part make up O’Donoghue’s unhappy triad. In Osgood–Schlatter disease, a painful bump directly below this body (10[1])part is caused by epiphyseal plate tension during growth spurts. (10[1])When (10[1])extended by the vastus medialis, this body part is stabilized by the screw-home mechanism and by posterior and anterior ligaments arranged in an “X” shape. The menisci (10[2])of this joint improve its shock absorption capacity. This joint’s soft cartilage hardens into bone at age four (-5[1])and connects the femur and tibia. For 10 points, a common reflex test involves striking the patella of what largest joint located between the shin and thigh? ■END■ (10[1])

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