In those cases, the spread between the bid & ask goes to the market maker as compensation for making a market in a stock. For a liquid stock that is easy for the market maker to turn around and buy/sell to somebody else, the spread is small (narrow).
In cerebral hypoxia, sometimes only the oxygen supply is interrupted. Brain cells are extremely sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.
For other uses, see hypoxia (disambiguation) . Cerebral hypoxia is a form of hypoxia (reduced supply of oxygen) specifically involving the brain; when the brain is completely deprived of oxygen it is called cerebral anoxia.he brain requires approximately 3.3 ml of oxygenated blood per 100 g of brain tissue per minute. Initially the body responds to lowered blood oxygen by redirecting blood to the brain and increasing cerebral blood flow.