Multiple Choice
Which of the following would reduce the glomerular filtration rate?
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25. The Urinary System
Renal Physiology: Regulation of Glomerular Filtration
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Which of the following will result in a decrease of glomerular filtration rate (GFR)?
A
Increased blood pressure
B
Constriction of the afferent arteriole
C
Constriction of the efferent arteriole
D
Dilation of the afferent arteriole
Verified step by step guidance1
Understand the role of the glomerular filtration rate (GFR) in the kidneys, which is the rate at which blood is filtered in the glomeruli of the kidney.
Recognize that the afferent arteriole brings blood to the glomerulus, while the efferent arteriole carries blood away from it.
Consider how changes in the diameter of these arterioles affect blood flow and pressure in the glomerulus. Constriction of the afferent arteriole reduces blood flow into the glomerulus, decreasing GFR.
Contrast this with the effect of constriction of the efferent arteriole, which increases pressure in the glomerulus and can increase GFR.
Analyze the effect of dilation of the afferent arteriole, which increases blood flow into the glomerulus, potentially increasing GFR.
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