Tolerance and resistance to ethanol is individual, private. There are people that alcohol, even in very small amounts, exercises it's toxicity, and people who "resist" long time to large quantities of alcohol.
It can not be determined, despite of all attempts of this kind, how much alcohol is beneficial or neutral to the body. Moreover, resistance to alcohol is not necessarily directly connected with toxic action which it may exercise. Ethanol, "working quietly", can wreak havoc in the body and when symptoms begin to appear, sometimes it can not be done anything. Many scientists consider that the great resistance of people to alcohol , it is a disadvantage, for this very reason.
For everyone is important to take into account the body's response to alcohol, although as noted, there are people who at moderate or large amounts of ethanol do not feel in any way. Even minor amounts of ethanol in the body can react. If events as nausea, drowsiness, headache or dizziness occur, consumption should be immediately abolished.
Alcohol, consumed sparingly, if natural, can make some services to the body, but abstinent should know that they lose nothing.
Do not consume a drop of alcohol in the following situations:
-working, driving, activities that require concentration
-any exogenous weaknesses
-whenever body reacts
Alcohol consumption, in order not to become harmful, it is better to follow some general rules:
-to be nor frequent or systematic
-not to be consumed on an empty stomach
-not to exaggerate (in general, you should not pass the threshold of 40 ml of ethanol)
-to resort to drink quality, natural, weaker, wine being the healthiest.
This topic can also be related to the California Science Content Standard Biology: 1.b. Students know enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of enzymes depend on the temperature, ionic conditions, and the pH of the surroundings.
The enzyme alcohol dehydrogenase is the second enzyme in a chain of reactions that causes the breakdown of alcohol in your body. Typically present in the digestive tract in humans, it is thought that certain populations do not possess as much of this enzyme as others, which is why some people are "allergic" to alcohol.