What is the correct statement below? a. The BBB displays great permeability to lipid soluble molecules

b. Neurons oxidize most of the substrate they use for energy production

c. Brain produces and utilizes ketones when glucose is scarce

d. After an overnight fast, the brain is deprived of glucose

e. Brain metabolism increases and reduces under resting and exercising conditions, respectively

c. Brain produces and utilizes ketones when glucose is scarce

Explanation:

Yes, brain utilizes ketones when glucose is present in low concentration because ketones also provides energy to the body. Glucose is the primary material which is used by the brain but when glucose is not available, the brain uses ketones such as β-hydroxybutyrate (βHB) and acetoacetate (AcAc) in order to fulfill its requirement in the fasting and prolonged starvation so we can conclude that our brain uses ketones in the absence of glucose.