Respuesta :
I believe that this forms a joint that allows for hinge like motion of the forearm.
The ulna extends through the forearm from the elbow to the wrist, narrowing significantly towards its distal end. At the proximal ends it forms the elbow joint with the humerus of the upper arm and the radius of the forearm. The ulna then extends past the humerus to form the tip of the elbow (olecranon). The hinge like motion of the elbow joint places the point of the olecranon well under the middle of the upper arm.
The ulna extends through the forearm from the elbow to the wrist, narrowing significantly towards its distal end. At the proximal ends it forms the elbow joint with the humerus of the upper arm and the radius of the forearm. The ulna then extends past the humerus to form the tip of the elbow (olecranon). The hinge like motion of the elbow joint places the point of the olecranon well under the middle of the upper arm.
Answer:
Option A, The hinge like motion of the forearm
Explanation:
A hinge joint allows for two motions at a time
a) Flexion - The bending motion
b) Extension - The strengthening motion of arm bones
At the proximal end , the Ulna forms a joint with the humerus and radius of forearm. The Ulna extends to form olecranon (the tip of the elbow) Both Ulna and radius bones are attached with an interosseous membrane that causes movement just like a hinge joint.
Option A is correct
