CONTROL OF NORMAL DRINKING
In drinking caused by, for example, water deprivation, both the cellular and extracellular thirst systems are activated. Experiments show that, in many species, it is the depletion of the cellular, rather than the extracellular, thirst system that accounts for the greater part of the drinking, typically around 75 per cent. It is important to note that we continue to drink fluids every day, even when our bodies aren’t deprived of water. The changes in this type of thirst signal are smaller, partly because drinking has become conditioned to events such as eating foods that deplete body fluids, and also because humans have a wide range of palatable drinks, which stimulate the desire to drink even when we are not thirsty.
In drinking caused by, for example, water deprivation, both the cellular and extracellular thirst systems are activated. Experiments show that, in many species, it is the depletion of the cellular, rather than the extracellular, thirst system that accounts for the greater part of the drinking, typically around 75 per cent. It is important to note that we continue to drink fluids every day, even when our bodies aren’t deprived of water. The changes in this type of thirst signal are smaller, partly because drinking has become conditioned to events such as eating foods that deplete body fluids, and also because humans have a wide range of palatable drinks, which stimulate the desire to drink even when we are not thirsty.
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