The Different Absorbance Spectra Expressed by the Three Types of Cone

Multiple Choice

The different absorbance spectra expressed by the three types of cone photoreceptors found in the human eye result from differences in:

A) The number of disc membranes found in the cone outer segments.
B) The stereoisomers of vitamin A found in the cone outer segments.
C) The type of opsins found in the cone outer segments.
D) The number of cyclic guanosine monophosphate (cGMP) -gated channels found in the cone inner segments.
E) The types of bipolar cells with which they synapse.