The processes of diffusion and active transport
are both used to
(1) break down molecules to release energy
(2) move molecules into or out of cells of the
body
(3) bring molecules into cells when they are
more concentrated outside of the cell
(4) move molecules against a concentration
gradient, using ATP molecules

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

the form of energy changes and the total energy increases0l