Dehydration and alcohol
As alcohol is toxic, the body tries to get rid of it by urination. With excessive urination the body also intensively loses minerals, such as sodium, potassium and magnesium ions. It causes lowering the ions concentration in the blood which is very dangerous for the health. Special receptors feel it and provide corresponding feedback to the regulative systems of the body.
To normalize the ions concentration, the body in response lets more water to excrete through the kidney. That’s why drinking more and more water does not help the specific thirst that always follows the alcohol drinking sessions. The victim just drinks and travels to the toilet for several hours.
At the same time oxidation of each alcohol molecule by the liver needs few molecules of water. So the water is taken to the liver from other parts of the body. It causes even more dehydration. Sense of dry mucous membranes and severe thirst indirectly point to the second degree of dehydration, in which the body loses up to 5% of its weight.
Dehydration causes the weakness, exaggerated feeling of hunger, and disorders in functions of muscles, brain and blood circulation system. For the human with average weight of 70 kilograms lack of fluid up to 3 liters, can significantly affect all the vital functions.