Which of the following statements with regard to vision is FALSE?
A. Photoreceptors are neurons.
B. There are two basic types of photoreceptors in the retina, rods, and cones.
C. There are normally four different photopigments in the retina.
D. There are four different chromophore molecules in the retina.
E. There are four different opsins in the retina.
D
You might also like to view...
Which canal and three foramina are found going through the sphenoid bone?
What will be an ideal response?
Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its conformation
Indicate whether the statement is true or false
The figure illustrates a medial view of bones of the right foot. What does "C" represent?
A. Metatarsals B. Talus C. Tibia D. Calcaneus E. Fibula
Which of the following is an increase in the number of receptors making a target cell more sensitive to a hormone?
A. The antagonistic effect B. Up-regulation C. Enzyme amplification D. Down-regulation E. Negative feedback inhibition