1. Metabolism
Living cells use nutrients in many chemical reactions that provide energy for vital processes and activities

2. Metabolisms function
Homeostasis: a healthy and relatively constant internal environment
Body regulates to avoid dangerous lacks or excesses

3. Chemical Balance
Body needs the right balance of nutrients and other substances dissolved in the blood and cells
Oxygen
Temperature
Removal of waste products

4. Energy for Metabolism
During metabolism, energy is both used and produced

5. Food Sources of Energy
Carbohydrates
Fats
Protein

6. Metabolic Rate
How fast the chemical process of metabolism takes place

7. Body temperature Changes in body temperature
Shiver=increased body heat=relatively constant metabolic rate
Metabolic processes release energy, in hot climates the metabolic rate slows to help cool the body

8. Body Size
Metabolic rate matches body size

9. Physical Development and Age
Cells function rapidly in young individuals in order to build the new material needed for development

10. Body Composition
Lean tissue takes more calories to maintain than other types

11. Energy Supply
Low energy = slower metabolism

12. Basal Metabolism
Energy used by a body at rest to maintain automatic, life-supporting processes

13. Basal Metabolic Rate (BMR)
A measure of heat given off per time unit, usually as Kcalories per hour

14. Voluntary Activities
Conscious and deliberate actions

15. Weight-Loss Diets
Very low-kcalorie “crash” diets are not the best way to lose weight

16. Physical Exercise Exercise increased metabolism
Toned muscles burn more calories

17. Metabolic Rate Calculate your Metabolic Rate
Men: 66+(6.23 X wt in pounds) + (12.7 X ht in inches) – (6.76 X age in years)
Women: (4.35 X wt in pounds) + (4.7 X ht in inches) – (4.7 X age in years)