Using a functional classification term, you tell me that a ______ joint is defined as being immovable.

Using a functional classification term, you tell me that a ______ joint is defined as being immovable.

• A. Diarthrotic
• B. Synarthrotic
• C. Amphiarthrotic
• D. Synarthrotic

Answer: (D)

Functional classification by mobility labels immovable joints as synarthrotic (synarthrosis). The name comes from Greek roots meaning “together joint,” highlighting that these joints are fused and permit no movement. Examples include the sutures between skull bones and other fibrous joints like gomphoses (tooth sockets). In contrast, diarthrotic joints are freely movable, and amphiarthrotic joints allow only slight movement. So, when a joint is defined as immovable, the correct term is synarthrotic.

Functional classification by mobility labels immovable joints as synarthrotic (synarthrosis). The name comes from Greek roots meaning “together joint,” highlighting that these joints are fused and permit no movement. Examples include the sutures between skull bones and other fibrous joints like gomphoses (tooth sockets). In contrast, diarthrotic joints are freely movable, and amphiarthrotic joints allow only slight movement. So, when a joint is defined as immovable, the correct term is synarthrotic.