American Academy of Professional Coders (AAPC) Practice Exam

What are the characteristics of synovial joints?

1. Articular cartilage, joint cavity, fibrous capsule, and accessory ligaments

2. Muscle fibers, synovial fluid, and bone growth plates

3. Nerve endings, blood vessels, and smooth muscle layers

4. Calluses, periosteum, and cartilage tears

The correct answer is: Articular cartilage, joint cavity, fibrous capsule, and accessory ligaments

The correct option accurately lists the defining features of synovial joints, which play a crucial role in the movement and functionality of the musculoskeletal system. Synovial joints are characterized by the presence of articular cartilage, which covers the ends of the bones and allows for smooth movement within the joint. The joint cavity is essential as it contains synovial fluid, which lubricates the joint, reducing friction during movement. A fibrous capsule surrounds the joint, providing stability and encapsulating the joint cavity, while accessory ligaments further support the joint and help maintain its structure and alignment during motion. This combination of components enables a wide range of motion and flexibility, making synovial joints vital in various physical activities. The other choices do not correctly identify the elements that define synovial joints. For instance, muscle fibers, synovial fluid, and bone growth plates pertain to muscle and bone structure rather than specifically highlighting the characteristics of synovial joints. Similarly, nerve endings, blood vessels, and smooth muscle layers relate to the broader field of physiology but do not directly correspond to the structural features of synovial joints, and elements like calluses, periosteum, and cartilage tears are unrelated to the fundamental characteristics of synov