BIOS 3430 Lecture 98: Study Guide for Osmo

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What produces more metabolic water, catabolism of a gram of fat or a gram of carbohydrate: animal-environmental gradient, surface-volume ratio- smaller organisms desiccate more easily. Integument permeability-integument-barrier (e. g. skin, insect cuticle: metabolic factors, feeding, and excretion rates, respiration. Animals with a small surface to volume ratio tend to desiccate faster. Metabolic water is water produced from the equation c6h12o6 +6o2 -> 6co2 +6h20. Lipid forms the most metabolic water at 1. 07 g/ g of food stuff. And carbohydrates is at 0. 56 g: compare the ionic composition of fresh versus sea water. Give an example (groups of taxa) of each: freshwater organisms have a concentration of 300 mosm vs 1000 for sea water. 1 (trimethylamine oxide): high concentrations of urea can denature proteins; Stenohaline: narrow range: what compounds do some organisms (sharks and rays, other elasmobranchs) use to maintain high osmolarity of body fluids, tmao and urea as defined above, marine teleosts tend to (lose/gain) water to their environment.

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