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NBME 22 Answers

nbme22/Block 3/Question#37 (19.3 difficulty score)
A 35-year-old man with bronchial asthma ...
Increase in cAMPπŸ”
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 +3 
submitted by mcl(597),
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impostersyndromel1000  are you able to clarify that phosphorylated myosin light chain kinase from cAMP/PKA and dephosphorylated myosin light chain from cGMP both cause smooth muscle relaxation? saw this on another Q with the nitrates causing headache so now im confused +  
dubywow  @impostersyndromel1000: Here is an image that summarizes cAMP and cGMP actions in smooth muscle cell very will. Hope it helps. link +2  
iwannabeadoctor2  cGMP is the use of Nitrates for endothelial vasodilation; B2 is a different action, similar end result. See this diagram for the adrenergic receptor actions. https://s3.amazonaws.com/classconnection/769/flashcards/5928769/png/screen_shot_2014-11-04_at_92935_am-1497B7358A4552ACB39.png +  
castlblack  cAMP INHIBITS myosin light chain kinase causing relaxation according to FA 2020 pg. 317 +3