HOSA Pathophysiology Musculoskeletal Practice Test 2026 – Complete Exam Prep

Osteoarthritis is a degenerative joint disease characterized by the breakdown of cartilage and the underlying bone. It is considered a progressive condition where the protective cartilage that cushions the ends of the bones wears down over time. This degeneration can lead to pain, stiffness, and decreased mobility in the affected joints. As the cartilage deteriorates, bones may begin to rub against one another, which further contributes to pain and potential joint deformity.

In addition to the wear and tear of cartilage, osteoarthritis also involves changes in the bone structure and the development of bone spurs. The condition is often associated with aging, repetitive joint use, and previous injuries. It can affect any joint but commonly impacts the knees, hips, hands, and spine.

While the other options describe various medical conditions, they do not accurately reflect the nature of osteoarthritis. The inflammatory disorder affecting the heart muscle pertains to a completely different system of the body, and conditions related to infection of the joints or genetic muscle disorders are distinct from the degenerative processes seen in osteoarthritis.