AP Biology - Water Potential Flashcards

7978921699	Water Potential	Measure of how freely water molecules can move	0
7978921700	Law of Thermodynamics	Water moves from regions of high energy to low energy	1
7978921701	Osmosis	Water diffuses from areas of high concentrations to low concentrations	2
7978921702	Negative Water Potential	__________________________________ indicates a decrease in water potential as water molecules move less freely due to higher concentrations of solute	3
7978921703	Equilibrium	Zero water potential indicates ___________________	4
7978921704	Transpiration	____________ occurs due to variations in water potential throughout the plant	5
7978921705	Hypotonic	When water diffuses into a plant cell when it is placed in a solution of higher water potential than inside it, the cell contents will expand, pushing against the cell wall, and the cell wall will become turgid	6
7978921706	Hypertonic	If a plant cell is placed in a solution of lower water potential, water will diffuse out, causing the cytoplasm to shrink and become flaccid. If enough water leaves, the cytoplasm pulls from the cell wall, and the cell becomes plasmolysed	7
7978921707	Isotonic	Concentration of solutes is equal inside and outside the cell, so water moves across the membrane in both directions maintaining cell size	8
7978921708	Animal Cells	___________________________ do not have cell walls, so if an animal cell expands excessively the cell will burst open and become haemolysed	9