Question

Stroke occurs when


1.  blood clot enters the cerebral circulation blocking an artery and causing the death of brain tissue


2.  a blood clot enters and blocks one of the coronary arteries


3.  blood clot dislodges from a vein and moves into the lung, where it blocks pulmonary artery


4.  the walls of an artery accumulate deposits and lose their flexibility and elastcity

Answer 1

A stroke occurs when the supply of blood to the brain is either interrupted or reduced. When this happens, the brain does not get enough oxygen or nutrients, and brain cells start to die. In the U.S., approximately 40 percent of people who die from stroke are male, with 60 percent of deaths occurring in females.