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.
The problem with hypoglycemia is that your insulin level is too high and your blood sugar is too low. The treatment for a low blood sugar is food containing sugar. Hypoglycemia is a very uncomfortable feeling. It takes about 15 minutes for sugar from the food to be absorbed before you feel the effect.f your blood sugar drops low enough, it's possible that you could pass out. Food and liquids cannot be given to a person who is unconscious. You should ask your doctor or nurse educator to teach a member of your family or a friend to give you a glucagon injection, in the event that you should need it.