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BIO409H5 (3)
Chapter 16

ch. 16 pg 667-679, 699-704.docx (INCOMPLETE)

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Angela B Lange

Ch. 16: Energy expenditure: body size, locomotion, and reproduction -Animals derive chemical energy from food, which they use to perform work, maintain their structural integrity, and ultimately reproduce. -animals degrade large organic compounds to transfer some of their chemical energy to special “high- energy” molecules, such as ATP -these molecules are subsequently used to drive endergonic (energy- requiring) reactions. -Thus, animals eventually use the chemical energy of food to produce electrical, ionic, and osmotic gradients, synthesize metabolites, and carry out work via muscle contraction -animals that are more effective at capturing and using the energy resources available in their environment are better able to compete against members of their own and other species, and are therefore more fit in an evolutionary sense The concept of energy metabolism -metabolism: is the sum total of all the chemical reactions occurring in an organism -because the rate of a chemical reaction increases with temperature, the metabolic activity of an animal is closely linked to its body temp. -a larg
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