Except Under Rare Conditions, What Organ is Almost Exclusively Reliant

Question

Except under rare conditions, what organ is almost exclusively reliant on glucose for energy?
A) brain
B) liver
C) small intestine
D) heart
E) kidney

Accepted Answer

The brain is almost exclusively reliant on glucose for energy under normal conditions because it cannot efficiently utilize fatty acids for energy. This makes glucose its primary and preferred energy source. Exceptions occur during prolonged fasting or ketogenic diets, where the brain can adapt to use ketone bodies as an alternative energy source.