BIOL 104 Lecture Notes - Lecture 9: Pancreas, Glucagon, Blood Sugar

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

Document Summary

Eating: eating allows energy intake, digestion allows energy storage. Lipids > fats (adipose tissue: 1g of fat stores twice as much energy as glycogen, glycogen attracts and holds a lot of water. The average person would weight 600lbs~ if all fat were stored as glycogen instead. The (cid:271)ody"s p(cid:396)i(cid:373)a(cid:396)y fo(cid:396)(cid:373) of e(cid:374)e(cid:396)gy sto(cid:396)age is fat: chemical changes by which energy is (cid:373)ade a(cid:448)aila(cid:271)le fo(cid:396) a(cid:374) o(cid:396)ga(cid:374)is(cid:373)"s use (cid:894)e(cid:374)e(cid:396)gy (cid:373)eta(cid:271)olis(cid:373)(cid:895) Cephalic phase: preparation to eat and onset of eating. Fasti(cid:374)g phase: e(cid:374)e(cid:396)gy f(cid:396)o(cid:373) sto(cid:396)ed food is used to (cid:373)eet (cid:271)ody"s (cid:396)e(cid:395)ui(cid:396)e(cid:373)e(cid:374)ts: flow of energy during the three phases is controlled by two pancreatic hormones. Released into bloodstream during the cephalic and absorptive phase. Diabetes: type (cid:1005): (cid:271)ody does(cid:374)"t (cid:373)ake any insulin, type 2: body does not make/use insulin well, glucagon. Promotes release of stored energy for use by the body: 2 major sets of theories of hunger and eating. Hunger signals an energy deficit, and eating returns energy to optimal level.