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Food items are measured in calories of stored energy because our bodies burn energy in amounts that we can also measure, and that measure is in the form of calories. A calorie is typically known as the amount of energy required to raise one gram of water one degree in temperature.

Much of the energy stored by our bodies is designed to be released fairly quickly from our muscles and from our deposits of fat. Muscles release this energy quickly so we can (historically) chase and catch prey, and also to elude predators.

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Where does the energy from human metabolism come from?

From the calories of what you eat.


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Do different races of people have different fat burning metabolisms?

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What is the food energy measured in calories kilograms or liters?

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Exercise can increase your metabolism by burning calories and building muscle, which can help you burn more calories even when you're at rest.


Do people burn calories at a different rate depending on their metabolism?

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What are the 2 things heat is measured in?

Heat is measured in calories or joules.


What is defined as muscle activity that burns calories?

Metabolism


How are calories measured?

kilocalorie (kcal)


What type of energy is a human?

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How much energy a human can receive from food?

The energy a human can receive from food is measured in calories, with the average adult requiring about 2,000 to 2,500 calories per day, depending on factors like age, sex, and activity level. Each macronutrient contributes differently: carbohydrates and proteins provide roughly 4 calories per gram, while fats provide about 9 calories per gram. The body converts the energy from food into ATP (adenosine triphosphate) to fuel various physiological processes. Ultimately, the energy received from food supports daily activities, metabolism, and overall health.