1. A 50-year-old male presents with stiffness in his joints and a decreased range of motion. Which condition is most likely responsible for these symptoms? A. Osteoarthritis B. Rheumatoid arthritis C. Gout D. Osteoporosis Answer: A. Osteoarthritis Rationale: Osteoarthritis is characterized by the degeneration of joint cartilage and the underlying bone, causing pain and stiffness, particularly in the hip, knee, and thumb joints. 2. A patient is diagnosed with a muscle strain. What is the primary physiological change that occurs in the muscle fibers? A. Hyperplasia B. Atrophy C. Hypertrophy D. Tearing Answer: D. Tearing Rationale: A muscle strain involves the tearing of muscle fibers, which leads to inflammation and pain in the affected area. 3. Which of the following is a common sign of a fracture? A. Crepitus B. Cyanosis C. Clonus D. Cachexia Answer: A. Crepitus Rationale: Crepitus is the grating sound or feeling produced by the friction between bone and cartilage or the fractured parts of a bone, and is commonly associated with fractures. 4. A patient with a history of chronic steroid use is at increased risk for which musculoskeletal condition? A. Osteoporosis B. Sarcopenia C. Fibromyalgia