Molecules that diffuse passively across the plasma membrane most rapidly are

Question

Quizplus · Accepted Answer

Small and hydrophobic molecules can pass through the plasma membrane most rapidly because they can dissolve in the lipid bilayer of the membrane and do not need a transport protein. Small and hydrophilic molecules can still pass through, but they require the help of transport proteins and may not diffuse as quickly. Large molecules cannot diffuse through the membrane at all and require active transport.

Molecules That Diffuse Passively Across the Plasma Membrane Most Rapidly