Biology 2601A/B Lecture Notes - Lecture 18: Isopoda, Onychophora, Glycogen
17 Dec 2017
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Document Summary
Desiccation is the single best problem for life in terrestrial habitats: Only a few phyla have made it on land. Essentially aquatic they tend to hang out in the films of water around soil particles (still tied to the water) Chordata (only tetrapod: birds, mammals, reptiles) where we belong. Losing water: evaporation across cuticle, respiration (through breathing), excretion (feces + urine), Water balance is the ability of the animal to balance amounts of water in and water out. Difference in the amount of water used to process the food along different pathways. For protein with urea production and protein with uric acid production. How much water we get from metabolizing food. Carbohydrates every gram we metabolize, we get 0. 56 grams of water a lot of water. For lipids, it"s even more for one gram of lipid 1. 07 grams of water. Carry more water (or collect it along the way) (ex: absorbing more water from environment instead of drinking it)
