PSI Barbering Practice Exam

An example of an immovable joint is the ___________________?

1. Knee

2. Hinge joint

3. Skull

4. Elbow

The correct answer is: Skull

An immovable joint, also known as a synarthrosis, is a type of joint where the bones are tightly fitted together and do not allow for any movement. The joints found in the skull are a prime example of immovable joints. These joints, known as sutures, are specifically designed to protect the brain by forming a strong, stable framework. As the person ages, these sutures may fuse completely, further enhancing the immobility. In contrast, the knee, hinge joint, and elbow are all types of movable joints. They allow for a significant range of movement. For instance, the knee is classified as a hinge joint that permits flexion and extension, and both the elbow and other hinge joints facilitate similar movements, but none can be categorized as immovable like the joints found in the skull.