chapter 15

What role do the maculae of the vestibule play in the inner ear?

• Sensing sound frequency

  
  

• Protecting the ear from loud noises

  
  

• Sensing gravitational forces and linear acceleration

  
  

• Amplifying sound waves

  
  

The ________ of the retina detect color and function only in ________ light.

•  

  cones, low

  
  

•  

  rods, bright

  
  

•  

  rods, low

  
  

•  

  cones, bright

  
  

The refraction of light within the eye mainly occurs in the:

• Retina

  
  

• Lens and cornea

  
  

• Vitreous humor

  
  

• Choroid

  
  

Tom is a 45-year-old male that has lost his ability to hear high frequency sounds. The most likely explanation for this would be ________.

•  

  damage to the hair cells near the oval window in the cochlear duct

  
  

•  

  a middle ear infection

  
  

•  

  an overgrowth of bony tissue, fusing the ossicles together

  
  

•  

  a perforated tympanic membrane

  
  

Which part of the inner ear is responsible for sensing rotation of the head?

• Organ of Corti

  
  

• Tympanic membrane

  
  

• Cochlea

  
  

• Semicircular canals

  
  

The optic disc forms a blind spot where the optic nerve leaves the eyeball.

• True

• False

In a person who is color-blind, which of the following would you most expect to see?

•  

  an inability to regenerate 11-cis-retinal after bleaching

  
  

•  

  a loss of their peripheral vision

  
  

•  

  a loss of functions in the rods of their retina

  
  

•  

  absence of green or red cones in their foveae

  
  

Paralysis of which eye muscle would prevent the right eye from looking to the left?

•  

  Medial rectus

  
  

•  

  Superior rectus

  
  

•  

  Lateral rectus

  
  

•  

  Inferior rectus

  
  

The photoreceptors in the eye are located on the inward facing side (closest to the vitreous humor) of the retina.

• True

• False

Sour taste receptors are stimulated by sodium ions of acidic food substances.

• True

• False