What is a potential consequence of a prolonged blockage of blood vessels in a stroke?

A prolonged blockage of blood vessels during a stroke leads to insufficient blood flow to brain tissue, which is critical for delivering oxygen and nutrients. When brain cells do not receive enough blood, they begin to die, resulting in more extensive brain damage. The longer the blood vessels remain blocked, the greater the area of brain tissue that can be affected, leading to more significant neurological impairment.

The other options do not accurately reflect the consequences of a stroke. Rapid heartbeat may occur as a response to various stressors, but it does not directly result from prolonged blood vessel blockage. Increased levels of oxygen would not occur, as the blockage prevents adequate oxygen from reaching the affected brain tissue. Improved neurological functions are highly unlikely, as ongoing blockage typically results in further deterioration of brain health and function, not improvement.