BIOL 104 Lecture Notes - Lecture 6: Osmoregulation, Osmosis, Diabetes Mellitus Type 1

• School: George Mason University
• Department: Biology
• Course: BIOL 104
• Professor: Laemmerzahl

Document Summary

Two basic ideas: to keep a balance of salts in your body. Water and salt must stay in balance (the body needs to have a certain concentration of ions to function correctly) As an example, think of terrestrial animals; most need to conserve water. Water is lost due to respiration, evaporation, through urine, etc: so water needs to be replaced and/or conserved, examples: Other adaptations: to remove metabolic wastes. The main problem is nitrogenous wastes, mostly leftover from proteins. There are three main ways of getting rid of nitrogenous wastes (figure. Waste removal: this is actually a bit complicated, but here is a summary: By regulating the permeability of the collecting duct membrane, urine can be concentrated or dilute as needed controlling the permeability of the membrane in the collecting duct (this also leads us into hormones) Adh (anti-diuretic-hormone) is produced in the hypothalamus and stored in pituitary: the hypothalamus monitors salt concentration of blood.