What type of molecule can rapidly cross a plasma membrane?

A) Large, polar molecules
B) Small, polar molecules
C) Large, hydrophilic molecules
D) Small, hydrophilic molecules
E) Small, hydrophobic molecules

Hydrophobic Molecules

Molecules that repel water and tend not to dissolve in it, often nonpolar substances like oils.

Hydrophilic Molecules

Molecules that are attracted to water and can dissolve in it easily, due to their polar nature.

Plasma Membrane

A semipermeable lipid bilayer that surrounds the cytoplasm of cells, controlling the movement of substances in and out of the cell.