$\beta$₁- and $\beta$₂-adrenoceptors _______, whereas ?₂-receptors _______. A) stimulate adenylyl cyclase; enhance free Ca²⁺ levels B) inhibit adenylyl cyclase; stimulate adenylyl cyclase C) stimulate adenylyl cyclase; inhibit adenylyl cyclase D) increase K⁺ channel opening; inhibit adenylyl cyclase

Question

Quizplus · Accepted Answer

F1F1F1S1F1F1F10₁- and F1F1F1S1F1F1F10₂-adrenoceptors both stimulate adenylyl cyclase, which leads to an increase in intracellular cAMP levels. However, α₂-receptors inhibit adenylyl cyclase, thereby decreasing intracellular cAMP levels. Therefore, the correct answer is C.

β\betaβ 1- And β\betaβ 2-Adrenoceptors _______, Whereas ?2-Receptors _______

$\beta$ ₁- And $\beta$ ₂-Adrenoceptors _, Whereas ?₂-Receptors _