<prompt> The fuel used by neurons during starvation is -GlucoseFatty acidAminoacidKetone  <response>: Ans. is d i.e., Ketone There is no stored fuel in brain, but it utilizes 60 of total energy under resting conditions. Glucose is virtually the sole fuel for the brain, except in prolonged starving when ketone bodies are the major source. Fatty acids do not serve as fuel for the brain, because they are bound to albumin in plasma; hence cannot cross blood-brain barrier. 