calorie
Yes, "calories" are a measurement of energy that is contained in the food you consume.
Calories are units of energy provided by food.
Chemical energy is contained in the bonds between atoms within molecules. When these bonds are broken or rearranged during a chemical reaction, energy is released or absorbed. Examples include the energy stored in food molecules like glucose and in fossil fuels like gasoline.
they are jules or kilojules which are 1000 jules
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Mitochondria are the cellular organelles responsible for releasing the energy contained in food through the process of cellular respiration. This process generates ATP, which is the main form of cellular energy used by the cell for various functions.
Calories
The recommended unit for any type of energy is, of course, the joule. The older unit, calorie, is still often used for food. If spelled with a capital "C", "Calorie", it usually means a kilocalorie.
Joules (J), the same for any measurement of energy.
The energy obtained from food is measured in units called calories. A calorie is a unit of energy that represents the amount of heat required to raise the temperature of one gram of water by one degree Celsius.
The food you eat obtained the energy contained in it by eating plants, and or eating other organisms which ate plants. Plants obtain energy by a process known as photosynthesis in which they receive energy from the sun (photons) and store it in sugars such as chlorophyll. These sugars are starches and other carbohydrates which can be broken down and the stored energy is released and used by your body.
In SI, all energy is measured in joules. It doesn't matter what type of energy you are referring to.