how is energy obtained from feed nutrients

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the amount of various nutrients in a feed that can be absorbed from the digestive tract is referred to as digestibility how is energy obtained from feed nutrients -obtained from theoxidation of both fats and sugars in the citric acid cycle

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  • How do cells get energy from food?

  • How Cells Obtain Energy from Food As we have just seen, cells require a constant supply of energy to generate and maintain the biological order that keeps them alive. This energy is derived from the chemical bond energyin food molecules, which thereby serve as fuel for cells.

  • How do you calculate the amount of energy from food?

  • To calculate the energy available from a food, multiply the number of grams of carbohydrate, protein, and fat by 4,4, and 9, respectively. Then add the results together. For example, 1 slice of bread with a tablespoon of peanut butter on it contains 16 grams carbohydrate, 7 grams protein, and 9 grams fat : 16g carbohydrate x 4 kcal/g = 64 kca l

  • Why do we need energy from food?

  • We need a minimum amount of calories from food to sustain basic metabolic functions and more to carry out physical activities. The more active we are, the more food we need. Energy comes from the macronutrients — carbohydrates, fat and protein — found in all foods.

  • What is the source of energy in a fuel cell?

  • This energy is derived from the chemical bond energyin food molecules, which thereby serve as fuel for cells. Sugars are particularly important fuel molecules, and they are oxidized in small steps to carbon dioxide (CO2) and water (Figure 2-69).

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