Assertion: cell membrane's structure | /r/CapableOf | allow oxygen
Facets:
value: down their concentration gradient
type: TRANSITIVE-OBJECT
value: by simple diffusion
type: MANNER
Source sentences:
text: The structure of the lipid bilayer allows only small, non-polar substances such as oxygen and carbon dioxide to pass through the cell membrane, down their concentration gradient, by simple diffusion.
text: The structure of the lipid bilayer allows only small, non-polar substances such as oxygen and carbon dioxide to pass through the cell membrane, down their concentration gradient, by simple diffusion.