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Retired NBME 23 Answers

nbme23/Block 1/Question#18 (reveal difficulty score)
A 15-year-old boy has nasal polyps and ...
Enzyme B ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: biochem pathways 35

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submitted by โˆ—sajaqua1(607)
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nmyEez A tadnss ni ofr ssePioappohhl ,2A ntrgniu hisspohiopdpl in the llec nmamrebe toin icracadnoih iscda. rmFo ert,eh yznmeE B sdasnt rof oyCoxegacneyls O(),CX whlie Emnyez C astsdn rfo onxeepisyag5-L )-.5OL( O5-L podersuc 5ET,HP-E ihhcw si tednur otni oe.elrntueiks ureeokitseLn aply a uobled orel in sentve leik h,amats ebaesuc eyth uacse tonoconinbirrtccsho eesn( ni isth eaittnp) and by ticagn sa ahcmceli tacstaatrtn orf tfayrommlnia csell, owehs cyttaivi will lseco het rawaiy euh.trfr yB nolcgbki COX ulrmeybasp( wthi an ),SANDI we aevle erom of the subttrsae cndaaiicrho idca rfo -OX5L to mtaultyile nvortec iotn okrst.eeueinl sTih si teh ssiba fro lniamiaratprenot-shs-tani, cihwh is ulnqrfteey dssoaetica ihtw lnaas p.pylos rSmea'(ts ).aditr

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FA 2019 pg. 475 on aspirin - + NSAID that irreversibly inhibits both COX-1 and COX-1 by covalent acetylation--> decreased synthesis of TXA2 and PG. + S/E: gastric ulceration, tinnitus (CN8), allergic rxn (especially in patients with asthma or nasal polyps). chronic use can lead to AKI, AIN, GI bleeding.


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