According to the Trichromatic Theory of Color Vision People Who

question 236

Multiple Choice

According to the trichromatic theory of color vision people who have red-green color blindness have:

• A)far fewer cones than people with normal color vision.
• B)normal red-sensitive cones, but lack blue-sensitive cones.
• C)normal blue-sensitive cones, but their other cones are sensitive to either red or green but not both.
• D)color receptors that are limited to the blue-yellow opponent pair.

---

Definitions:

Neuropeptide

One of a group of peptides produced in neural tissue that function as signaling molecules; many are neurotransmitters.

Prostaglandin

A collection of lipid molecules that exhibit varying hormone-like functions across animal species.

Hormones

Hormones are chemical messengers produced by glands in the body that regulate physiological processes by signaling to distant organs and tissues.

Chemical Messengers

Molecules that transmit signals from one cell to another, often hormones or neurotransmitters.