How does oxygen pass through the plasmalemma
A)across the membrane's lipid portion
B)through membrane channels
C)always by passive processes
D)always by active transport
E)both through membrane channels and always by passive processes

Question

Quizplus · Accepted Answer

Oxygen, being a small molecule, can pass through the plasmalemma by simple diffusion, moving from an area of high concentration (outside of the cell) to an area of low concentration (inside the cell) across the lipid portion of the membrane. This is a passive process and does not require any energy expenditure by the cell. There are no specific channels or active transport mechanisms required for oxygen to pass through the plasmalemma.

How Does Oxygen Pass Through the Plasmalemma