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13 Cards in this Set
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- Back
diffusion |
transport of material due to the random movement of particles; net movement is from areas of high concentration to areas of low concentration |
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hyperosmotic |
a term describing organisms with body fluids with a lower concentration of water and higher solute concentration than the external environment. |
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hypoosmotic |
a term describing organisms with body fluids with a higher concentration of water and lower solute concentration than the external environment |
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isomotic |
a term describing organisms with body fluids containing the same concentration of water and solutes as the external environment |
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matric frrces |
a force resulting from water's tendency to adhere to the walls of containers such as cell walls or the soil particles lining a soil pore |
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metabolic water |
water released during oxidation of organic molecules. |
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osmoregulation |
regulation of internal salt concentration and water using a variety of anatomical structures and physiological processes; an energy-consuming process |
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osmosis |
diffusion of water down its concentration gradien |
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relative humidity |
a measure of the water content of air relative to its content at saturation; relative humidity = water vapor density/saturation water vapor density × 100 |
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saturation water vapor pressure |
the pressure exerted by the water vapor in air that is saturated with water vapo |
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vapor pressure deficit |
the difference between the actual water vapor pressure and the saturation water vapor pressure at a particular temperature. |
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water potential |
the capacity of water to do work, which is determi-ned by its free energy content; water flows from positions of higher to lower free energy. Increasing solute concentration decreases water potential |
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water vapor pressure |
the atmospheric pressure exerted by the water vapor in air; increases as the water vapor in air increases. |