Which adrenergic receptor produces its stimulatory effects by the formation of inositol 1,4,5-triphosphate ( $\left.\mathrm{IP}_{3}\right)$ and an increase in intracellular $\left[\mathrm{Ca}^{2+}\right]$ ?

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[ I C 1 a]. Adrenergic $\alpha_{1}$ receptors produce physiologic actions by stimulating the formation of inositol 1,4,5-triphosphate $\left(\mathrm{IP}_{3}\right)$ and causing a subsequent increase in intracellular $\left[\mathrm{Ca}^{2+}\right]$. Both $\beta_{1}$ and $\beta_{2}$ receptors act by stimulating adenylate cyclase and increasing the production of cyclic adenosine monophosphate (cAMP). $\alpha_{2}$ Receptors inhibit adenylate cyclase and decrease cAMP levels. Muscarinic and nicotinic receptors are cholinergic.

Which Adrenergic Receptor Produces Its Stimulatory Effects by the Formation IP3)\left.\mathrm{IP}_{3}\right)IP3​)

Which Adrenergic Receptor Produces Its Stimulatory Effects by the Formation $\left.\mathrm{IP}_{3}\right)$