Pharmacology When activated by b-adrenergic receptors, the G protein: A Activates phospholipase C B Activates adenylate cyclase C Activates protein kinase C D Conves guanosine diphosphate (GDP) to guanosine triphosphate (GTP) 💡 Explanation When activated by b-adrenergic receptors, the G protein: ✓ Correct Answer: B. Activates adenylate cyclase