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Multiple Choice
Which of the following joints is considered immobile or nearly immobile?
A
Ball-and-socket joint
B
Pivot joint
C
Suture
D
Hinge joint
Verified step by step guidance
1
Step 1: Understand the types of joints in the human body. Joints are classified based on their mobility into three categories: immobile (synarthrosis), slightly mobile (amphiarthrosis), and freely mobile (diarthrosis).
Step 2: Review the characteristics of a suture joint. Sutures are fibrous joints found in the skull where bones are tightly bound by dense connective tissue, making them immobile or nearly immobile.
Step 3: Compare the mobility of other joints listed in the problem. Ball-and-socket joints (e.g., shoulder and hip) are diarthrotic and allow a wide range of motion. Pivot joints (e.g., the atlantoaxial joint in the neck) are also diarthrotic and allow rotational movement. Hinge joints (e.g., elbow and knee) are diarthrotic and allow movement in one plane.
Step 4: Recognize that suture joints are the only type listed that are classified as synarthrotic, meaning they are immobile or nearly immobile.
Step 5: Conclude that the correct answer is 'Suture,' as it is the joint type that fits the description of immobility or near immobility.