Question

the joint between the diaphyses of theradius and ulna is a ______.

a suture

b gomphosis

c syndesmosis

d synchondrosis

e symphysis

Explanation:

Identify the anatomical structures

The question asks about the structural classification of the joint located between the diaphyses (shafts) of the radius and the ulna.

Analyze the joint type

Using the Syndesmosis Anatomy knowledge point
The shafts of the radius and ulna are bound together by a broad, fibrous sheet called the interosseous membrane. This type of fibrous joint, where parallel bones are united by relatively long collagenous fibers or a sheet of fibrous tissue, is structurally classified as a syndesmosis.

Evaluate the given options

• A suture is a fibrous joint found only between the bones of the skull.
• B gomphosis is a fibrous joint that binds teeth to their bony sockets.
• C syndesmosis is a fibrous joint where bones are joined by a longer ligament or interosseous membrane, such as between the radius and ulna.
• D synchondrosis is a cartilaginous joint bound by hyaline cartilage.
• E symphysis is a cartilaginous joint bound by fibrocartilage.

Answer:

• A suture
• B gomphosis
• C syndesmosis (Correct answer)
• D synchondrosis
• E symphysis