Final answer:
The statement that a supinated grip would be palms down is FALSE. Supination involves rotating the forearm so the palm faces up, while pronation rotates the palm to face down.
Step-by-step explanation:
The correct answer is B) FALSE. A supinated grip means the palms are facing up, not down.
In an anatomical context, supination refers to the rotation of the forearm in such a way that the palm faces anteriorly, or forward when in the anatomical position. This position implies that the forearm is in the supinated position and the radius and ulna bones of the forearm are parallel. On the other hand, pronation is the motion that moves the palm from the palm forward (supinated) to the palm backward (pronated) position, which results in the radius crossing over the ulna to form an "X" shape.
To visualize supination, imagine standing with arms at your sides and palms facing forward; this is the anatomical position with the forearms supinated. Conversely, if you turn your palms to face backward, you are performing pronation.