Taller 9. Absorción, Nutrición, Digestión (cap 51) 1. 51.1. As heterotrophs, animals must obtain the energy and molecular building blocks for biosynthesis from their food. Energy can come from the metabolism of carbohydrates, fats, and proteins. Molecular...
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Taller 9. Absorción, Nutrición, Digestión (cap 51) 1. 51.1. As heterotrophs, animals must obtain the energy and molecular building blocks for biosynthesis from their food. Energy can come from the metabolism of carbohydrates, fats, and proteins. Molecular building blocks include carbon skeletons, vitamins, and minerals. a. Explain the different roles of food energy from proteins, carbohydrates, and fats in the mammalian body. See p. 1070 and Figure 51.3 b. Give an example of an essential carbon skeleton, a micronutrient, and a macronutrient. See pp. 1070–1073, Figure 51.4 and Table 51.1 c. Why should fat-soluble vitamins not be taken in excess? See p. 1 2. 51.2 Heterotrophs have diverse adaptations for acquiring food. Once captured and/or ingested, food is digested extracellularly by secreted enzymes to release nutrients, which are absorbed into the animal’s body, usually via a tubular gut. a. Why do herbivores typically spend a great deal of their time feeding? See p. 1074 b. What is
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