CAMRT Radiography Practice Exam

What are the functional classifications of joints?

1. Synarthrosis

2. Amphiarthrosis

3. Diarthrosis

4. All of the above

The correct answer is: All of the above

The functional classifications of joints categorize them based on the degree of movement they permit. Each type plays a distinct role in the body’s overall mobility and stability. Synarthrosis represents immovable joints, such as those found in the skull where bones are fused together. This type of joint provides stability and protection to the brain by preventing movement. Amphiarthrosis refers to joints that allow for slight movement. An example is the intervertebral discs of the spine, which permit limited flexibility while still providing a solid structure. Diarthrosis includes freely movable joints, such as the knee or shoulder. These joints are characterized by a joint cavity filled with synovial fluid, allowing for a wide range of motion. Considering all these types together, the correct answer encompasses all three functional categories: synarthrosis, amphiarthrosis, and diarthrosis, highlighting the diverse ways joints operate to facilitate movement and stability in the body.