Main autonomic receptor types and postreceptor mechanism may vary from one tissue to another

on Wednesday, March 9, 2011

Question: USMLE step 1 Mcq 4

Main autonomic receptor types and postreceptor mechanism may vary from one tissue to another. Select the correct match of receptor / tissue /postreceptor mechanism for the following tissues

a) M2 / heart / opening of ligand-gated calcium channels
b) Nm / skeletal muscle endplate / increased IP3 and diacylglycerol
c) Alpha-2 / smooth muscle and glands / decrease of camp
d) Beta-2 / smooth muscle / increased cAMP
e) Dopamine-1 / smooth muscle / increased IP3 and diacylglycerol

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