AP BIOLOGY

Detailed explanation-1: -Cerebral hypoxia is a neurological condition that happens when the brain doesn’t get enough oxygen, even though there is good blood flow. It is a medical emergency that can happen from many events where oxygen to the brain may be cut off, such as from drowning, choking, suffocation, cardiac arrest, or head injury.

Detailed explanation-2: -Severe oxygen deprivation can cause life-threatening problems including coma and seizures. After 10 minutes without oxygen, brain death occurs. Brain death means there is no brain activity. A person needs life support measures like a mechanical ventilator to help them breathe and stay alive.

Detailed explanation-3: -Without oxygen, the brain’s cells cannot metabolize glucose, and therefore cannot convert glucose into energy. When your brain is deprived of oxygen, then, the ultimate cause of brain death is inadequate energy to power the brain’s cells.

Detailed explanation-4: -Hypoxic brain injuries are brain injuries that form due to a restriction on the oxygen being supplied to the brain. The restricted flow of oxygen causes the gradual death and impairment of brain cells.

Detailed explanation-5: -The brain is an organ that cannot store oxygen, so blood vessels deliver oxygen through the blood. A lack of blood supply can cause a stroke, therefore causing surrounding nerve cells to be cut off from nutrients and oxygen. If the brain tissue lacks oxygen for more than three or four minutes, the tissue begins to die.