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9 Cards in this Set

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  • Back
What is Diffusion?
movement from a higher concentration to a lower concentration
What is Osmosis?
the diffusion of water across a selectively permeable membrane
What is Water Potential?
a solute's relative concentration

It affects the rate and direction of osmosis
What is Isotonic Solution?
the solute concentration outside of the cell is the same as the solute concentration inside the cell
What is Hypotonic Solution?
the solute concentration outside of the cell is lower than the solute concentration inside the cell
What is Hypertonic Solution?
the solute concentration outside of the cell is higher than the solute concentration inside the cell
If a cell is hypertonic to its surroundings, what would happen? What would happen in an animal cell? A plant cell?
Water rushes into the cell, causing it to expand.

In an animal cell, it will cytolize (cells bursting)

In a plant cell, the rigid wall of the cell will hold it together; in the end, the pressure exerted on the cell wall by the water supports the stems and leaves of the plant.
If a cell is hypotonic to its surroundings, what would happen? What would happen in an animal cell? A plant cell?
It loses water, causing it to shrink (plasmolysis)

An animal cell, when plasmolyzed, lose shape and support, and shrivel up

In plants, the plasma membrane will pull away from the cell wall; the loss of pressure on the cell wall causes the plant to wilt.
Water potential consists of 2 components. What are they?
*Pressure Potential = the exertion of pressure on a solution

*Osmotic Potential = the relative concentration of solutes within the 2 solutions