AP BIOLOGY

Detailed explanation-1: -The major energy source for the brain is glucose. Indeed, the human brain consumes approximately 20% of the glucose-derived energy (5.6 mg/100 g of brain tissue; Erbsloh et al., 1958).

Detailed explanation-2: -Glycolysis is important in the cell because glucose is the main source of fuel for tissues in the body. For example, glucose is the only source of energy for the brain. To ensure normal brain function, the body must maintain a constant supply of glucose in the blood.

Detailed explanation-3: -Glycolysis is essential for a variety of neural activities in the brain, including energy production, synaptic transmission, and redox homeostasis.

Detailed explanation-4: -Central regulation of energy metabolism. In normal individuals, food intake and energy expenditure are tightly regulated by homeostatic mechanisms to maintain energy balance. Substantial evidence indicates that the brain, particularly the hypothalamus, is primarily responsible for the regulation of energy homeostasis.