AP Bio Insta-Review Topic 2.8*: Tonicity & Osmoregulation

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Science, Biology
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
What is tonicity?
Back
Tonicity refers to the ability of a surrounding solution to cause a cell to gain or lose water. It is determined by the concentration of solutes in the solution compared to the concentration of solutes inside the cell.
2.
FLASHCARD QUESTION
Front
Define isotonic solution.
Back
An isotonic solution has the same solute concentration as another solution, resulting in no net movement of water across the cell membrane.
3.
FLASHCARD QUESTION
Front
What happens to a cell in a hypertonic solution?
Back
In a hypertonic solution, the solute concentration outside the cell is higher than inside, causing water to move out of the cell, leading to cell shrinkage.
4.
FLASHCARD QUESTION
Front
What is a hypotonic solution?
Back
A hypotonic solution has a lower solute concentration compared to another solution, causing water to move into the cell, which may lead to cell swelling or bursting.
5.
FLASHCARD QUESTION
Front
Explain osmoregulation.
Back
Osmoregulation is the process by which organisms regulate the water and solute concentrations in their bodies to maintain homeostasis.
6.
FLASHCARD QUESTION
Front
What is water potential?
Back
Water potential is the measure of the potential energy in water, influencing the direction of water movement. It is affected by solute potential and pressure potential.
7.
FLASHCARD QUESTION
Front
Calculate the water potential if pressure potential is 0.2 MPa and solute potential is -0.6 MPa.
Back
Water Potential = Pressure Potential + Solute Potential = 0.2 MPa + (-0.6 MPa) = -0.4 MPa.
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