Multiple Choice
In many freshwater protists, which organelle helps prevent the cell from swelling and bursting by collecting and pumping excess water out of the cell?
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9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
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In cell biology, what is diffusion?
A
The movement of molecules across a membrane against their concentration gradient using energy from ATP
B
The movement of water across a selectively permeable membrane from lower solute concentration to higher solute concentration
C
The bulk flow of fluid and dissolved substances driven by a pressure gradient through a vessel or tube
D
The net movement of particles from an area of higher concentration to an area of lower concentration due to random thermal motion
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Passive Transport: Diffusion and Osmosis practice set
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