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USMLE
Renal and Urinary Systems
Assuming that renal perfusion pressure remains constant, which of the following combined changes in afferent and efferent arteriolar resistance would result in an immediate increase in renal plasma flow and glomerular filtration rate?
Explanation
ExplanationIf afferent arteriolar resistance is decreased (i.e., arteriole is dilated), renal plasma flow (RPF) increases. In order for glomerular filtration rate (GFR) to increase, the efferent arteriolar resistance must be maintained. This will produce an increased volume in the glomerulus and increase glomerular hydrostatic pressure (PGC), which will increase GFR.
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