Describe the thirst mechanism


Cellular sensors within the interstitial fluid are affected by changes in the fluid around them. They trigger the hypothalamus to interpret these signals as thirst and as a result, the individual will be stimulated to increase his or her fluid intake. This thirst mechanism cannot always be relied on, however. In older adults, thirst sensation decreases. In the trained, elite athlete, thirst sensation may not be a valid indication of need for additional fluid.

Nutritional Science

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