ANFS445 Lecture Notes - Lecture 5: Homeothermy, Food Energy, Anabolism

• School: University of Delaware
• Department: Animal and Food Sciences
• Course: ANFS445
• Professor: Erin Brannick

Document Summary

In isolated system, change always trends toward greater disorder: transfer heat to other atoms as disorder is increased, figure 7. 1 the second law of thermodynamics in action. Energy of directional motion is converted to energy of random motion in this isolated system. It is go(cid:374)e a(cid:374)d (cid:272)a(cid:374)"t (cid:271)e used (cid:271)(cid:272) it"s t(cid:396)a(cid:374)sfe(cid:396)(cid:396)ed to e(cid:374)(cid:448)i(cid:396)o: energy intakes. Ingested energy e present in chemical bonds of food: energy then accumulates in body tissues to a certain degree, ca(cid:374)"t al(cid:449)ays (cid:271)e sto(cid:396)ed lo(cid:374)g-term, ex: glycogen, figure 7. 2 the uses of energy by an animal. All the green boxes refer to chemical energy. Heat from the general environment must be excluded from measurement of animal heat. I(cid:374) la(cid:448)oisie(cid:396)"s de(cid:448)i(cid:272)e, heat e(cid:374)te(cid:396)i(cid:374)g f(cid:396)o(cid:373) the air surrounding the calorimeter was intercepted by an outer ice-filled jacket, which prevented the environmental heat from melting the same ice as the animal heat.