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β-Blockers Inhibit an Adrenergic Receptor Found on Many Cell Types

Question 31

Multiple Choice

β-blockers inhibit an adrenergic receptor found on many cell types in the body,including heart cells.Patients who have arrhythmias (irregular heartbeats) most likely benefit from what downstream action of these drugs?


A) increased frequency of IP3 release
B) activation of PLC
C) increased adenylyl cyclase activity
D) decreasing cAMP-mediated effects on contraction rate

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