Catecholamines mediate their effects through
(I)α-adrenoreceptors.
(II)β-adrenoreceptors.
(III)receptor tyrosine kinases.
(IV)monomeric G protein receptors
)
A)I only
B)II only
C)I and II
D)III and IV
E)IV only

Question

Quizplus · Accepted Answer

Catecholamines, such as epinephrine and norepinephrine, primarily mediate their effects through α-and β-adrenoreceptors. Receptor tyrosine kinases are typically activated by growth factors, rather than neurotransmitters like catecholamines. Monomeric G protein receptors are utilized by many different types of signaling molecules, but are not the primary mechanism for catecholamine signaling. Therefore, the best choice is C, which includes α-and β-adrenoreceptors, the primary receptors responsible for mediating catecholamine effects.

Catecholamines Mediate Their Effects Through