Inhibition of heart by vagus by M2
receptors is medicated by which
mechanism?
a) cAMP
b) Cat’
c) DAG
d) None
Correct Answer - A
Ans. A. cAMP
Muscarinic receptors (cholinergic receptors) in heart are M2 type.
These are responsible for vagus mediated bradycardia.
M2 mediated actions are through cAMP