BIO 203 Study Guide - Midterm Guide: Heat Transfer, Metabolic Waste, Thermal Conductivity
22 Jan 2020
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Every time we use energy we generate heat endogenous heat production . Organism must either dilute ammonia or change the form of ammonia. Ammonotelic: organisms excrete ammonia in their urine. Con: uses lots of water to dilute ammonia (water loss: 0. 5l) Ureotelic: convert ammonia into urea, which is insoluble. Pro: no water really needed to dilute urea, urea not too toxic (water loss: 0. 05) Uricotelic: convert ammonia into uric acid which is super insoluble. Pro: uses little water to eliminate (water loss: 0. 001l) Ex: birds: their excretions are not water soluble. Temperature is an index of molecular motion (avg kinetic energy) Heat obtained: gained from external environment, endogenous heat production. Higher metabolic heat, more endogenous heat production. Head lost: heat lost to external environment. ** the organism"s heat in must = heat out, organisms use heat transfer. Heat is directly transferred through touch ex: external environment and organism. When t1>t2 transfer from t1 to t2.
