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.
While many people with attention deficit disorders have benefited from the drug, it can have some scary consequences for those who abuse it, Diller says. Here's a look in your brain as you swallow a drug like Adderall. 00:20:00. After roughly 20 to 30 minutes, youâll experience a mild euphoric lift, Diller explains.