animal3-osmoregulation-lecture

animal3-osmoregulation-lecture - P osmoconform: body fluids...

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Water is needed by cells and body fluids cells. .. shape, size, metabolism etc. Blood. .. volume, pressure , concentration of solutes Terrestrial animals lose water
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Aquatic animals also face ionic/osmotic challenges Animals vary in their tolerance to dehydration P Annelids (earthworms) P Molluscs (slugs) P Molluscs (snails) P Crabs P Insects P Frogs P Birds P Mammals (ex camels) P 75% P 80% P 45-50% P 15-18% P 25-70% P 28-45% P 4-8% P 10% (30%)
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Strategies for water balance P osmoregulate: maintain internal osmolarity steady despite changes in the animal’s environment, or in water/salt uptake or loss.
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Unformatted text preview: P osmoconform: body fluids are the same osmolarity as the animals environment. Aquatic animals face ionic/osmotic changes Osmoregulation in freshwater: gills 50 mOsm 300 mOsm ATPase Osmoregulation in salt water: gills Blood: 300 mOsm 1100 mOsm Chloride cells Na+ Osmoregulation in SW & on land: kidneys & ADH 1 2 3 ADH 8 Water Water Na, K, Cl Na, glu, aa K+, H+, HCO 3-, drugs, toxins K+, H+, drugs, toxins Urine production in nephrons Osmoregulation: ADH 1 2 3 4 4 5 Posterior...
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animal3-osmoregulation-lecture - P osmoconform: body fluids...

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