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.
Another common fact about Botox that women don't know is how long it takes to see the effects of it. When we asked our NewBeauty Facebook fans how long they think it takes, we heard answers in the range of 24 hours to five weeks! Again, Dr. Spiegel clears it up: Everyone is different.