BIO203H5 Lecture Notes - Osmoregulation, Nutrient, Peptide
Document Summary
Animals that eat other animals are called heterotrophs. Large packets of food that enter the mouth must be reduced to monomers that can be absorbed by cells and enter the bloodstream. Digestive system analogous to oil refinery or lumber mill. Animals get the chemical energy and carbon containing building blocks they need from carbohydrates and fats. Animals also require other nutrients substances an organism needs to remain alive. Food is any material that contains nutrients. When an animal takes in enough neutritents to perform day to day tasks and stays healthy it is said to be in nutritional balance. Disease results when individual is out of nutritional balance. Understanding which nutrients an individual needs, and in what amounts, are basic issues in research on animal nutrition. Recommended daily allowances (rdas) specify the amount of each essential nutrient including essential amino acids, vitamins, essential elements, and electrolytes required to meet the needs of practically all healthy people.
