PSL301H1 Lecture Notes - Lecture 29: Proximal Tubule, Brainstem, Body Fluid
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Psl301 lecture 29: water: general information about water. Water gain: 2. 2l from food and water, 0. 3l from metabolisms total 2. 5l/day intake. Water loss: 0. 9l from skin and lung (sweating + water vapour), 1. 5l from urine, 0. 1l from feces total 2. 5l/day output. 70% of water is reabsorbed by the proximal tubule, 15% reabsorbed by the loop and. 70% of na+ is reabsorbed by the proximal tubule, and 20% reabsorbed by the loop, 10% absorbed by dct+cd. Most of the h20 are reabsorbed following na+. We reabsorb 99% of all filtered water. We are losing water as we breath (water vapour), and as we sweat. *when we drink more water, our kidney will excrete the amount of water that we absorbed. When we are deprived of body fluid, our kidney decreases the amount of water excreted, thus by reabsorbing more water: sensing water balance.
