Western Governors University (WGU) HLTH1010 C458 Health, Fitness, and Wellness Practice Exam

The primary energy source for brain metabolism is carbohydrates. Within the body, carbohydrates are broken down into glucose, which is the main fuel for the brain's activities. The brain is highly dependent on glucose because it cannot store energy in the form of glycogen as other tissues do. While fats and proteins can also serve as energy sources when necessary, they are not the preferred or primary sources for brain function. In particular, the brain requires a continuous supply of glucose to maintain cognitive functions, support neuronal activities, and ensure overall brain health. Therefore, carbohydrates, which are essentially the sugars and starches we consume, play a crucial role in providing the necessary energy for brain metabolism.