EBIO 1220 Lecture Notes - Lecture 18: Anticoagulant, Muscle Fatigue, Diuretic
1 Mar 2017
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Osmoregulation maintaining desired water and ion balance. Movement of water and solutes (substances dissolved in water) Keep the good stuff in, get rid of the bad stuff. Varies by habitat: fresh- vs. saltwater; land vs. water. Hypertonic for most vertebrates more salty than your body"s own cells. Concentrated urine with lots of salt, little water. Hypotonic less salty than your body"s own cells. Pee a lot (dilute urine with few salts) Nitrogenous wastes byproducts of breaking down proteins and amino acids. Ammonia - a very small and toxic molecule (nh3) Excreted by animals with access to water (dilute) If you want to store your urine for a while, you don"t want your pee to be toxic. Useful if you"re trying to conserve water. Main diet is seaweed (very salty diet) Always under pressure to get rid of salt. Darwin said, most disgusting and clumsy lizard he has ever seen . They sneeze salt out which excretes it.
