Question

which substance is processed less efficiently by cocaine addicts, according to pet scan results?
protein
glucose
carbohydrates
sucrose

Explanation:

PET (Positron Emission Tomography) scans are used to study brain activity. Cocaine addicts show differences in brain metabolism. Glucose is the main fuel for the brain. Studies have shown that cocaine addicts have reduced glucose metabolism in certain brain regions compared to non - addicts. Sucrose is a disaccharide (not the main brain fuel in this context). Carbohydrates is a broad category. Protein is not the primary energy source for the brain under normal circumstances (the brain prefers glucose).

Answer:

glucose