BIO 102 Lecture 22: Chapter 34 notes
Document Summary
The energy content of food is expressed in units of 1,000 calories. Nutrients: substances obtained by food and water that organisms need to maintain health. Calorie: the amount of energy required to raise the temperature of one gram of water by one degree celsius. Metabolic rate: the speed at which cellular reactions occur. Body mass index (bmi) is based on height and weight and is a common tool for estimating healthy weight. Essential nutrients: raw materials which must be supplied in the diet. Essential fatty acids: serve as raw materials used to synthesize molecules involved in a wide range of physiological activities. Essential amino acids: obtained from protein-rich foods such as meat, milk, eggs, corn, beans and soybeans. Minerals: elements that play many crucial roles in animal nutrition. Vitamins: are a diverse group of organic molecules that animals cannot synthesize, but that are necessary for cell function, growth and development.
