In Olfactory Receptor Cells,signal Transduction Cascades Often Follow This Order

Multiple Choice

In olfactory receptor cells,signal transduction cascades often follow this order:

A) receptor binding → G-protein activation → cAMP → cell depolarization
B) cell depolarization → increased intracellular Ca²⁺ → adenylate cyclase activation
C) receptor binding → opening ion channels → G protein activation → cell depolatization
D) cell depolarization → adenylate cyclase → G-protein activation → conformational change