The Physics Behind the Senses

Science and Technology · 10 questions

The physical mechanisms involved in vision, hearing, touch, taste, and smell.

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1. Which structure contributes most to focusing incoming light by bending it?

   1. Iris
   2. Cornea
   3. Retina
   4. Crystalline lens
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   B) Cornea

2. Which structure vibrates before airborne sound vibrations are transmitted to the middle-ear ossicles?

   1. Tympanic membrane
   2. Vestibule
   3. Cochlea
   4. Basilar membrane
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   A) Tympanic membrane

3. Which type of skin receptor detects mechanical stimuli such as pressure and vibration?

   1. Mechanoreceptors
   2. Chemoreceptors
   3. Thermoreceptors
   4. Photoreceptors
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   A) Mechanoreceptors

4. Outside the tongue, in which regions can taste buds also occur?

   1. Nasal cavity and sinuses
   2. Tooth enamel and gums
   3. Larynx and trachea
   4. Soft palate and pharynx
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   D) Soft palate and pharynx

5. For photons with frequencies f and 3f, what is the ratio E(3f)/E(f)?

   1. 3
   2. 1/3
   3. 1
   4. 9
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   A) 3

6. Where on the cochlear basilar membrane do high-frequency sounds produce the strongest response?

   1. Near the apex
   2. Center of the vestibule
   3. Middle-ear ossicles
   4. Near the base
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   D) Near the base

7. Which type of photoreceptor plays a key role in color vision?

   1. Retinal ganglion cells
   2. Rods
   3. Cones
   4. Bipolar cells
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   C) Cones

8. On which extensions of olfactory neurons are the receptor proteins for odor molecules found?

   1. Myelin sheaths
   2. Synaptic terminals
   3. Cilia
   4. Axons
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   C) Cilia

9. What type of receptors in the skin respond to changes in temperature?

   1. Mechanoreceptors
   2. Chemoreceptors
   3. Thermoreceptors
   4. Photoreceptors
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   C) Thermoreceptors

10. When focusing on a nearby object, how does the eye lens change to increase its refractive power?

    1. Constant curvature
    2. Increased curvature
    3. Decreased curvature
    4. Zero curvature
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    B) Increased curvature