Question

question 16 of 25
the statement below refers to a structure of the cell.
oxygen diffuses through this structure, but a sodium ion may need active transport.
which structure is this statement most likely referring to?
a. a permeable membrane
b. a cell wall
c. a semipermeable membrane
d. a hydrogen pump

Explanation:

Semi - permeable membranes allow small non - polar molecules like oxygen to diffuse through by simple diffusion. Ions like sodium ions, being charged, often require active transport to cross due to the membrane's selective permeability.

Answer:

C. A semipermeable membrane