BIOL 1002 Chapter : Digestion Chapter 34 Part 1 Of 2
Document Summary
Four main steps: acquisition of nutrients, digestion, if required, distribution of nutrients through the body, synthesis of molecules for the body. Animal cells require a continuous supply of energy and one of the main functions of nutrition is to act as an energy source. Required to break down large molecules for building blocks. This is not true in plants because they rely on photosynthesis for their energy needs. Exercise (and mental activity) greatly boosts caloric needs. The categories of nutrients that animals consume reflect this need for energy supplying foods. 5 major categories of animal nutrients: _lipids__________, _carbohydrates________________, ___proteins______________, _minerals_________________, __vitamins_____________ Lipids are a great energy source- they provide ___more energy/gram_________________ than any other nutrient source. We store our extra calories as fat because: Fats are _hydrophobic__________________ and do not cause accumulation of water. Functions ____as insulation________________ because fat conducts less heat (figure 29-1) Fats also supply: certain hormones, cell components (membranes, nerve cell coverings.
