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NBME 19 Answers

nbme19/Block 4/Question#26 (4.6 difficulty score)
54 yo man, routine exam; given an angiotensin ...
Area labeled by letter 'F' (efferent arteriole)🔍

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submitted by cassdawg(548),

ANG-II (angiotensin II) preferentially constricts the efferent arteriole. (FA2020 p588) This preserves GFR by the "back pressure" pushing filtration to occur.

ACE inhibitors block the conversion of ANG-I to ANG-II.

Here is a good diagram.

And here is a labelling of the parts of the glomerulus.