* Neurons: Neurons are highly active cells that require a constant supply of energy to maintain their electrical potential, transmit signals, and perform other vital functions. While they can utilize other fuels in a pinch, glucose is their primary source. They lack the enzymes needed to break down fatty acids for energy and are particularly sensitive to low glucose levels.
* Red blood cells: Red blood cells lack mitochondria, the cellular powerhouses that typically break down glucose for energy. Instead, they rely on glycolysis, a metabolic pathway that occurs in the cytoplasm and converts glucose into ATP (adenosine triphosphate), the cell's primary energy currency.
Therefore, both neurons and red blood cells are highly dependent on glucose for their energy needs, making it a crucial nutrient for overall bodily function.
