Principles of Human Physiology
Quiz 18 :
The Urinary System
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In spite of the large volume of fluid that enters the kidneys every day, glomerular filtration rate (GFR) is highly regulated to minimize changes that might alter urine output. Describe the intrinsic mechanisms involved in the maintenance of GFR in the presence of a stimulus that would elevate GFR.
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Glucose is an important component of the blood that is usually completely reabsorbed (there is no glucose in the urine). Outline the process whereby glucose is transported across the tubular epithelial cells, including the concepts of transport maximum and renal threshold.
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Ultimately, our ability to assess the function of the kidneys involves measuring what is excreted in urine. Describe the methods used to assess the function of the kidneys (glomerular filtration rate [GFR]), including the calculations and ions involved in that assessment.