BIOL 103 Lecture Notes - Tsetse Fly, Urea Cycle, Lipoprotein Lipase
Document Summary
Rate increased by surface area, which is increased by villi (lacteals, capillaries) and microvilli fatty acids taken up by lacteals. Absorptive state: ingested nutrients inter the blood from gastrointestinal tract. Post-absorptive state: gastrointestinal tract in empty of nutrients; body"s stores must supply energy. Packaged and enter blood circulation, enzyme lipoprotein lipase releases fatty acids into triglycerides, which are stored in fat cells until body required energy. Absorbed amino acids taken up by all body cells, used to synthesize proteins which are constantly being degraded. Excess amino acids are converted by liver cells into glucose or triglycerides. Urea cycle is not cheap many steps to get final product. Similar to digestion in vertebrates, but no pepsin, because their stomach is not acidic enough. Tsetse fly salivary glands adaptation: active proteases eliminated with feces; fly lays eggs in fur, larvae start to eat living flesh (trypsin, chymotrypsin like, which they poop out, ph is high and kills bacteria on flesh)
