Stroke occurs when there is an interruption of blood flow to which organ?

• A. Heart
• B. Lungs
• C. Kidneys
• D. Brain

Answer: (D)

Stroke is a disruption of the brain’s blood supply. The brain depends on a continuous flow of oxygen and glucose to function; when blood flow is interrupted, brain cells begin to die within minutes, leading to sudden neurological symptoms such as weakness, speech trouble, or vision changes. There are two main types: a blockage that stops blood flow (ischemic stroke) and bleeding from a ruptured vessel (hemorrhagic stroke), but in both cases the organ affected is the brain. If the blood supply to the heart were interrupted, that’s a heart attack, not a stroke, and issues in the lungs affect breathing rather than brain tissue. Because the question focuses on which organ is impacted by a stroke, the correct organ is the brain.