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What role does glucose play in the body?

  1. It regulates temperature

  2. It circulates in the blood as the major source of energy

  3. It aids in digestion

  4. It protects against infections

The correct answer is: It circulates in the blood as the major source of energy

Glucose is a simple sugar and plays a crucial role in the body's metabolism as the primary source of energy for cells. Once carbohydrates are consumed, they are broken down into glucose, which then enters the bloodstream. This circulating glucose is utilized by various tissues and organs to produce energy necessary for physical and mental activities. The body relies on glucose for functioning, especially in brain cells, which predominantly utilize glucose to meet their energy demands. This highlights the significance of glucose in providing the fuel needed for various physiological processes and maintaining overall health.