Question

movement of small, lipid soluble molecules
small lipid soluble molecules would move through the plasma membrane by
multiple choice
titration.
pumping.
osmosis.
diffusion.
active transport.

Explanation:

The plasma - membrane is composed of a lipid - bilayer. Small, lipid - soluble molecules can pass through the lipid - bilayer of the plasma membrane down their concentration gradient without the need for energy or a transport protein. This process is called diffusion. Titration is a laboratory technique in chemistry, pumping requires energy and is for substances moving against their concentration gradient, osmosis is the movement of water molecules, and active transport requires energy and transport proteins.

Answer:

D. diffusion