PHED-2507EL Chapter 24: Chap 24 - Metabolism
25 Jun 2018
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Chap. 24 - METABOLISM
Nutrients
Nutrients are used for metabolic fuel, but some
are for cell structures and molecular synthesis
•Nutrient: substance in food needed for growth,
maintenance, repair
•Macronutrients: three major nutrients that make
up the bulk of ingested food
–Carbohydrates, lipids, and proteins
•Micronutrients: two other nutrients that are
required, but only in small amounts
–Vitamins and minerals
•Water is required, so technically it is a nutrient
© 2016 Pearson Education, Inc.
Table 24.1-1 Summary of Carbohydrate, Lipid, and Protein Nutrients
© 2016 Pearson Education, Inc.
Document Summary
Nutrients are used for metabolic fuel, but some are for cell structures and molecular synthesis: nutrient: substance in food needed for growth, maintenance, repair, macronutrients: three major nutrients that make up the bulk of ingested food. Carbohydrates, lipids, and proteins: micronutrients: two other nutrients that are required, but only in small amounts. Vitamins and minerals: water is required, so technically it is a nutrient. Table 24. 1-1 summary of carbohydrate, lipid, and protein nutrients. Table 24. 1-2 summary of carbohydrate, lipid, and protein nutrients (continued) Table 24. 1-3 summary of carbohydrate, lipid, and protein nutrients (continued) Corn and beans together can provide all eight essential amino acids. Anabolism and catabolism: anabolism: synthesis of large molecules from small ones (example: synthesis of proteins from amino acids, catabolism: hydrolysis of complex structures to simpler ones (example: breakdown of proteins into amino acids) Metabolism: cellular respiration: catabolic breakdown of food fuels whereby energy from food is captured to form adenosine triphosphate (atp) in cells.
