If you lay your forearm along the table,you can rotate it so that your hand changes from a palm-down to a palm-up position.This is possible because your radius and ulna join at a ________ joint.
A)ball-and-socket
B)hinge
C)pivot
D)twist

Question

Quizplus · Accepted Answer

A pivot joint allows for rotation around a single axis, which is what allows the forearm to rotate and the hand to change from a palm-down to a palm-up position. Ball-and-socket joints allow for movement in multiple axes, hinge joints allow for movement in one direction (like in the elbow), and "twist" is not a recognized joint type.

If You Lay Your Forearm Along the Table,you Can Rotate