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The proximal end of the ulna illustrates the relationship of form and function. The rounded trochlear notch articulates with the hourglass shape of the trochlea. This forms a joint that allows for ________.
a. the rotational motion of the forearm
b. the curling of the fingers
c. the hinge like motion of the forearm
d. the hyper extension of the forearm

Respuesta :

Answer: c. the hinge like motion of the forearm

Explanation:

The hinge joint can be found in the elbow region. It is formed by the articulation of the distal end of humerus and proximal end of ulna bone and distal end of radius bone. It allows the process of bending as well as the extension of the forearm. It also facilitates the rotational movements of the radius and also with the ulna that facilitates the palm of the hand to be turned downward and upwards.  

The trochlea is a hourglass-shaped structure can be found on the distal end of the humerus. This articulates with the trochlear notch of the ulna. This association performs the hinge like function for the forearm.    

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