Cyanide prevents oxygen fromaccepting electrons at the end ofthe electron transport chain. Oneof the first symptoms of cyanidepoisoning is unconsciousness.Which of the following is a logicalexplanation for why the brain isaffected by cyanide more than therest of the body?

a. The brain runs out of oxygenbefore the rest of the body does.
b. Cyanide prevents oxygen frombeing used in the brain.