Monday, Febuary 12, 2007

Monday, Febuary 12, 2007 - Hypertonic Lower water potential...

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Hypertonic Lower water potential More solutes dissolved. Hypertonic solutions will tend to gain water Hypotonic Higher water potential Fewer solutes dissolved Hypotonic solutions will tend to lose water. Isotonic Equivalent water potential Equivalent number of solutes dissolved No net movement of water Marine Invertebrates Isotonic with seawater Accumulate free amino acids to match the tonicity of seawater. Marine Elasmobranch fishes Fishes and rays Isotonic with seawater Accumulate up to .5 m urea. Freshwater bony fishes Hypertonic to seawater How do cells regulate metabolism How do cells organize and control the chemical reactions that support life? Metabolic Transformations o Chemical reactions
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o Small steps o Controlled processes o Each stuff controlled by a protein catalyst (enzyme) Biological Chemical Reactions Regulated by protein catalysts (enzymes)
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