A 44-Year-Old Man Comes to the Office for a Routine

question 196

Multiple Choice

A 44-year-old man comes to the office for a routine check-up.  Past medical history is significant for hypercholesterolemia, which he has controlled through diet.  His father died of a myocardial infarction at age 56, and his mother, who is still living, has a history of stroke.  On physical examination, the patient's blood pressure is 160/100 mm Hg and heart rate is 70/min.  He is started on enalapril.  During the first 7 days of therapy, the patient's glomerular filtration rate (GFR) adjusts as shown in the graph below. Which of the following structures was most likely affected by a downstream effect of enalapril and is therefore responsible for this patient's renal response?

• A)Afferent arterioles
• B)Distal tubules
• C)Efferent arterioles
• D)Proximal tubules
• E)Vasa recta

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Definitions:

Suffix

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Describes individuals or organisms that have reached a fully developed or advanced stage of growth or development.

Suffix

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Floss

A thin filament used to clean between the teeth and gums for dental hygiene.