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.
Without oxygen the brain will not last long. When a childâs oxygen supply is cut off completely for just 10 seconds, theyâll lose consciousness. Within just 4 to 6 minutes of oxygen deprivation, brain cells are destroyed â this can result in brain damage, or even death. Oxygen deprivation, often referred to as hypoxia, means the flow of oxygen is decreased to at least 1 area of the body. Perhaps the most dangerous form of oxygen deprivation is cerebral hypoxia, which is a lack of oxygen to the brain.