A blood alcohol concentration (BAC) or blood alcohol level (BAL) reflects the amount of alcohol in the body. Food, type and quantity of beverage, weight, sex, and rate of elimination determine the BAC after the consumption of alcohol.
The process of oxygen transfer in the gills of a fish is a good example of the benefits of countercurrent exchange. As oxygen poor blood meets an opposed flow of oxygen rich water, the oxygen begins to diffuse out of the water and into the blood stream.
Backflow is the undesirable reversal of the flow of water, or a mixture of water and pollutants, into the distribution pipes of your potable water system. It happens when a âcross connectionâ within the water system is reversed due to a pressure drop.ackflow is the undesirable reversal of the flow of water, or a mixture of water and pollutants, into the distribution pipes of your potable water system. It happens when a âcross connectionâ within the water system is reversed due to a pressure drop.