Which molecules require active transport to enter or exit the cell?

it's unlikely a majority of a large population would agree on issues

hope this : )

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.

i am going to guess that it is co2.

characteristics of hydrocarbons