A fibrous joint that is a peg-in-socket is called a ________ joint.

• A. syndesmosis
• B. suture
• C. gomphosis
• D. synchondrosis

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the definition of a fibrous joint. Fibrous joints are connections between bones where the bones are held together by dense connective tissue, allowing little to no movement.
2. Step 2: Learn about the specific types of fibrous joints. These include sutures (found in the skull), syndesmoses (bones connected by ligaments), and gomphoses (peg-in-socket joints).
3. Step 3: Focus on the term 'peg-in-socket.' This describes a joint where one bone fits into a socket-like structure of another bone, such as the connection between teeth and their sockets in the jawbone.
4. Step 4: Match the description 'peg-in-socket' to the correct type of fibrous joint. Gomphosis is the term used for this type of joint, specifically referring to the tooth and its alveolar socket.
5. Step 5: Review the other options provided (syndesmosis, suture, synchondrosis) to ensure they do not fit the 'peg-in-socket' description. Syndesmosis involves ligaments, suture involves interlocking bones in the skull, and synchondrosis is a cartilaginous joint, not fibrous.