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NBME 23 Answers

nbme23/Block 3/Question#49 (22.6 difficulty score)
Genetic analyses of cells obtained on ...
Epinephrine🔍
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 +6  upvote downvote
submitted by seagull(1080),
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ppieneEnihr si teh only G lcepudo epcreort roctaavit eht islt. Teh rtse are ehrtie erillenr-cutal ro a nriseoyt nkaies isunl.()in

hello  intracellular* correcting in case it trips someone up +5  



 +3  upvote downvote
submitted by krewfoo99(76),

Epinephrine acts mostly on Beta receptors. Beta receptors are G coupled.

baja_blast  Alpha receptors are also G-coupled and are another potential site of action for Epinephrine (at high doses according to SketchyPharm Sympathomimetics) +  



 -1  upvote downvote
submitted by diabetes(15),

how is adrenal medulla has ACH nicotinic receptor which are ligand-gated Na/k channeles ? muscarinic ACH receptors are G-protein-coupled receptors.

gdupgrant  epinephrine acts on alpha or beta adrenergic receptors which are all G protien receptors. muscarinic receptors are also G coupled but Acetyl choline wasnt an answer choice. In the adrenal medulla the chromaffin cells are kinda like modified post ganglionic neurons and have nicotinic receptors. +