BIOLOGY 2F03 Chapter Notes - Chapter 6: Namib Desert, Vapor Pressure, Water Potential
22 Sep 2016
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Increased temperatures can lead to high rates of water loss. The sonoran desert cicada it buzzes even at high t. how is it coping: animals must be able to produce appropriate internal water conditions. 6. 1 concentration gradients influence the movement of water. Different biomes tend to have different water availabilities: arctic tundra and boreal forest snow-sites: variable water availability. Water-loss depends on t and water content of air around organisms. The water content of air = relative humidity. Warm air can hold water vapour than cool air . Total atmospheric pressure pressure exerted by all gasses in air. Water vapor pressure partial pressures due to water vapor. Saturation water vapour pressure pressure exerted by the water vapor in air that is saturated with water. Diffusion to move down concentration gradient. Osmosis movement for water [high] [low]; creates osmotic pressure. Isosmotic same concentration internally as is external. Hypoosmotic [high] internal, and lose water to environment.
