Quiz 1: Special Sensory Organs Flashcards

1
Q

Auricle

A
  • Skin elastic cartilage
  • Collects sound and directs it to external acoustic meats
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2
Q

External acoustic meatus

A
  • Bony cartilaginous canal that runs from the auricle to the tympanic membrane
  • Transmits sound to the tympanic membrane and produces ear wax to prevent foreign particles from entering the middle and inner ear
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3
Q

Tympanic Membrane (eardrum)

A
  • An oval and semitransparent membrane that moves in response to air vibrations
  • It transmits these vibrations to the ossicles via the malleus bone
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4
Q

Auditory Ossicles

A
  • The three smallest bones in the body called the malleus, incus, and stapes
  • Articulate with each other via synovial joints and transmit vibrations from tympanic membrane to the oval window
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5
Q

Oval Window

A
  • Membrane covering the entrance to the inner ear
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6
Q

Auditory Tube

A
  • Connects the middle ear with the nasopharyngeal
  • Equalizes pressure on both sides of the tympanic membrane, preventing rupture under high pressures
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7
Q

Cochlea

A
  • Snail/spiral shaped organ that contains fluid and hair cells
  • Displacement of the hair cells due to vibrations/pressure from the middle ear transmits impulses to the brain
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8
Q

Otolith Organs (Utricle and Saccule)

A

Detective linear acceleration and changes in head position

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9
Q

Semicircular canals

A
  • Detect rotation accelerations to head position
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10
Q

Cornea

A
  • Outer part of eye
  • Clear, dome shaped outer layer of the eye that covers the rest of the structures
  • Transmits and focuses light
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11
Q

Iris

A
  • Pigmented diaphragm with a central opening (pupil)
  • Contains smooth muscle that alters size of pupil to regular amount of light entering eye
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12
Q

Lens

A
  • An ellipsoid structure located posterior to the iris
  • Transmits and focuses light onto the retina
  • Adjusts the focus of the eyes on different distances in a process called ACCOMODATION
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13
Q

Cilliary Body

A

Contains smooth muscle that alters the shape of the lens to allow for accomodation

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14
Q

Retina

A
  • Highly vascularized and innervated back wall of the eye located opposite the pupil and lens
  • Converts light that enters into your eye into electrical signals your optic nerve sends to your brain which creates images you see
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