The major source of energy for the body and its cells is glucose, a simple sugar derived from carbohydrates in the diet. When carbohydrates are consumed, they are broken down into glucose, which enters the bloodstream and is transported to cells for use in cellular respiration. This process generates adenosine triphosphate (ATP), the primary energy currency of the cell, enabling various biological functions and activities. Additionally, fats and proteins can also serve as energy sources when carbohydrates are scarce.
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