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- Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
- 1) having a lower osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
- 2) having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
- 3) denoting or relating to a solution having the same osmotic pressure as some other solution, especially one in a cell or a body fluid.
- Structure of the Plasma Membrane. Like all other cellular membranes, the plasma membrane consists of both lipids and proteins. The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments.
- amoeba
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