To determine: Whether the higher glucose concentration in blood than it can be reabsorbed in the kidney would result in loss or gain of water.
Introduction: Maintenance of osmotic balance in tissues is essential to perform different
Explanation of Solution
Reabsorption refers to the selective movement of solutes, like amino acids, glucose, and several other inorganic ions, from the filtrate present in the tubules system to the body fluids. Further, they move back into the blood stream through surrounding peritubular capillaries. Reabsorption of water also occurs and this process can be controlled for regulating the extent of water loss. When the glucose concentration is about 180 mg/100 mL in blood, saturation occurs. In untreated diabetes mellitus, the glucose concentration in blood exceeds this quantity. The glucose molecules that remain in the glomerular filtrate are then eliminated in the urine. An increase in the quantity of glucose in the blood would decrease the quantity of water that is reabsorbed, thus ultimately resulting in the loss of water.
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Chapter 49 Solutions
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