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Testing Your Knowledge
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1. What is a sense organ?

2. What are the three general types of senses?

3. How can a pigment associated with a protein transduce an environmental stimulus into a sensation?

4. Distinguish between sensation and perception.

5. Distinguish between ocelli and ommatidia.

6. How does the nervous system detect different smells?

7. In what way are the sense of smell and taste similar?

8. Explain three adaptations in the visual system that enabled primates to dominate the treetops.

9. List the structures of the human eye and their functions.

10. In humans, otolilth movement provides equilibrium and balance. What is the corresponding structure in an invertebrate?

11. Why doesn’t burning your tongue on a hot slice of pizza permanently damage your sense of taste?

12. How does vision in humans differ from that of an insect?

13. How do we see colors other than red, blue, or green?

14. In what ways do the three major structures of the inner ear (cochlea, semicircular canals, and vestibule) function similarly?

15. Sensation results from an anatomical pattern of many sensory cells that transmit impulses to a nerve leading to a specific part of the brain. Describe the organization of neurons in three human senses that fit this pattern of funneling incoming information from many sensory neurons to a nerve fiber leading to the brain.

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