Food Energy Is Chemical Energy Essay

1465 Words Jan 8th, 2016 6 Pages
Food energy is chemical energy that animals and humans obtain from their food and molecular oxygen through cellular respiration. Human and other animals need a minimum intake of food energy to sustain their metabolism and to drive their muscles. Foods are composed of carbohydrates, fats, proteins, water, vitamins, and minerals. Organisms derive food energy from carbohydrates, fats and proteins as well as from organic acids, polyols, and ethanol present in the diet. Some diet components that provide little or no food energy, such as water, minerals, vitamins, cholesterol, and fiber, are also essential for the health and survival of humans and animals. In my science project, my question is which food component gives us the most energy: carbohydrates, proteins or fat. My hypothesis is that fat gives us the most energy.
Since in our daily diet, carbohydrates are in a larger portion than protein and fat, we would like to find out what give us the most food energy, carbohydrates, protein or fat.
The human body uses the energy released by respiration for a wide range of purposes: about 20% of the energy is used for brain metabolism, and the rest is used for the general metabolic requirements of other organs and tissues. In cold environments, metabolism may increase simply to produce heat to maintain body temperature. One of the uses of energy is by the skeletal muscle to maintain posture and produce motion. Moreover, energy is important for the body growth, development and…

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