BIO 3302 Lecture Notes - Lecture 15: Kangaroo Rat, Uric Acid, Dissolved Load
4 Dec 2016
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Lecture 15 ion and water balance in terrestrial environments. Continuous dehydration from evaporative water loss (ewl)-----this is obligatory exchange. Mammals: there are thin layers of lipids between the cells that form the integument and this cuts down on ewl from the evaporative body surface: e. g. Amphibians and reptiles: are subjected to more water loss across body surface (cid:271)e(cid:272)ause they do(cid:374)"t ha(cid:448)e these lipids: value of lipids wiping behaviour in tree frog (phyllomedusa) They phyllomedusa has 242 resistance, while the standard tree frog (hyla) is 3. 3. Inhaled air is humidified by passing over the nasal tissues nasal mucosa. Water evaporates from the nasal mucosa into the inhaled air to humidify it to. As this happens, it tends to cool the nasal mucosa. When you exhale, the warm air passes over the cool nasal mucosa, which then condenses the water out of the air onto the nasal mucosa. This helps retain the water from the exhaled air.
