Since there are only three types of cones, how can you explain the fact that we see many more colors?

Marieb, Hoehn 7th Edition
Ch. 13 The Peripheral Nervous System and Reflex Activity
Problem 33What is the homeostatic value of flexor reflexes?
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Key Concepts
Flexor Reflex
Homeostasis in Reflexes
Neural Pathways of Reflex Arcs
Characterize each receptor activity described below by choosing the appropriate letter and number(s) from keys A and B.
_____ , _____ (1) You are enjoying an ice cream cone.
_____ , _____ (2) You have just scalded yourself with hot coffee.
_____ , _____ (3) The retinas of your eyes are stimulated.
_____ , _____ (4) You bump (lightly) into someone.
_____ , _____ (5) You are in a completely dark room and reaching toward the light switch.
_____ , _____ (6) You feel uncomfortable after a large meal.
Key A:
a. Exteroceptor
b. Interoceptor
c. Proprioceptor
Key B:
(1) Chemoreceptor
(2) Mechanoreceptor
(3) Nociceptor
(4) Photoreceptor
(5) Thermoreceptor
Describe the response of rhodopsin to light stimuli. What is the outcome of this cascade of events?
What clinical information can be gained by conducting somatic reflex tests?
What is the structural and functional relationship between spinal nerves, skeletal muscles, and dermatomes?