Biology 2601A/B Lecture Notes - Semipermeable Membrane, Molality, Relative Permittivity

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Osmoregulation: balancing water and ions in both the cells and the body to allow physiological function. The amount of stuff /solutes in a solution. 1 mol of solutes = 1 osmole. This measurement is cumulative: 0. 2 m of 5 things = 1 osmole. Allows proteins to fold, involved in the lipid bilayer. Water molecules hydrogen bind to the protein; this mean the water is not active (can"t interact with other components of the protein) Keeps ions dissociated (the amount of ions dissociated in a water solution is very high. Determines the cell volume in animals: cell volume is often the bottom level of regulation of water and ion balance. Comparison of plant and animal cells at high and low concentrations. Remember that hypoosmotic means that there is more solutes and less water on the inside of the cells; water will move into cells, causing them to burst.

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