Respiratory System 293189.Signal transduction in the epithelium lining the region with the
arrow differs from that in rod cells stimulated by light in which of the fol-
lowing ways?
a. Sodium influx into receptor cells
b. Involvement of specific G proteins
c. Stimulation of a cyclic nucleotide
d. Stimulation leading to depolarization
e. Bypass of the protein kinase system