Final answer:
A supinated grip means that the palm faces forward, which is a palms-up grip, making the statement false. A pronated grip would be a palms-down orientation.
Step-by-step explanation:
The statement that a supinated grip would be palms down is false. In the anatomical position, a supinated grip or forearm means that the palm faces anteriorly (forward), with the ulna and radius bones of the forearm parallel to each other. This is the position you would use as if to scoop up soup with a spoon. In contrast, a pronated grip occurs when the palm faces posteriorly (backward) and the radius crosses over the ulna, forming an X-shape. Supination is a rotational movement where the forearm turns to place the palm in an anterior-facing (forward) position, indicating a palms-up grip.