Special Senses Flashcards

1
Q

Special Senses

A

Olfactory (smell), Gustatory (taste), Hearing and Equilibrium, Sight

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2
Q

Sense of Smell

A

Odor, Receptor Cell, Olfactory Bulb, Olfactory Tract, Limbic System

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3
Q

Taste Sensations

A

Sweet, Sour, Bitter, Salty, Savory (Umami)

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4
Q

Umami

A

A savory taste, is one of the five basic tastes, together with sweet, sour, bitter, and salty. A loanword from the Japanese umami can be translated “pleasant savory taste”

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5
Q

Outer Ear

A

Auricle, Auditory Canal

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6
Q

Auricle

A

Collects sound waves

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7
Q

Auditory Canal

A

Filter air, funnels sound

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8
Q

Middle Ear

A

Eardrum, Auditory Ossicles, Auditory (eustachian) Tube, Tympanic Cavity

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9
Q

Auditory Ossicles

A

Malleus, Incus, Stapes
Transmit vibrations and amplifies sound

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10
Q

Auditory (eustachian) Tube

A

Equalize air pressure (connection of middle and throat)

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11
Q

Tympanic Cavity

A

Transmit sound

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12
Q

Inner Ear (Labyrinth)

A

Semicircular Canals, Cochlea, Organ of Corti, Vestibulocochlear Nerve, Round Window

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13
Q

Semicircular Canals

A

Helps with equilibrium

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14
Q

Cochlea

A

Hearing - Turn vibrations into electrical impulses

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15
Q

Organ of Corti

A

Hairlike receptors that vibrate as sound hits them

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16
Q

Vestibulocochlear Nerve

A

Sends hearing and balance info to brain

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17
Q

Round Window

A

Decompressed vibration energy in the cochlea

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18
Q

How hearing works

A
  1. Sound waves enter the external auditory canal
  2. Eardrum vibrates
  3. Auditory ossicles (malleus, incus, stapes) amplify vibrations
  4. Stapes hit the oval window and transmit vibrations to the cochlea
  5. Organs of Corti contain receptor cells (hair cells) that deform from vibrations
  6. Round window dissipates vibrations within the cochlea
    We lose hearing when fibers of hair cells inside the cochlea are damaged by loud noises
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19
Q

Associated Structures of Eye

A

Conjunctiva, Extrinsic Eye Muscles, Lacrimal Glands

20
Q

Conjunctiva

A

Covering around the eye and under the eyelids
Pink Eye - also known as conjunctivitis (from bacteria, very contagious)

21
Q

Extrinsic Eye Muscles

A

Move the eye

22
Q

Lacrimal Glands

A

Produce tears, which drain into the nasal cavity via the lacrimal duct

23
Q

Outer Tunic of the Eye

A

Cornea, Sclera, Optic Nerve

24
Q

Cornea

A

Transport dome that focuses light

25
Q

Sclera

A

Continuation of cornea, going toward the back of the eye (white of the eye)

26
Q

Optic Nerve

A

Exits at the optic disk and transmits information from the eye to the occipital lobe of the brain

27
Q

MiddleTunic of the Eye

A

Choroid, Ciliary Body, Lens, Iris, Pupil, Aqueous Humor

28
Q

Choroid

A

Contains blood vessels

29
Q

Ciliary Body

A

Holds the lens in place

30
Q

Lens

A

Focusing

31
Q

Iris

A

Colored portion of the eye

32
Q

Pupil

A

Opening for light to enter

33
Q

Aqueous Humor

A

Liquid surrounding the lens

34
Q

Inner Tuni of the Eye

A

Retina, Fovea Centralis, Optic Disc, Vitreous Humor

35
Q

Retina

A

Has photoreceptors, which are sensors for light

36
Q

Fovea Centralis

A

Region of the sharpest vision, also called the macula

37
Q

Optic Disc

A

Where nerve fibers leave the eye, creating the blind spot

38
Q

Vitreous Humor

A

Supports internal parts, and fluid within the eye

39
Q

Photoreceptors

A

Rods, Cones

40
Q

Rods

A

Monochromatic (black and white)
Most sensitive to brightness of light

41
Q

Cones

A

Color Vision (red, yellow, blue)

42
Q

How does the Eye work?

A

Accommodation - Lens changes shape to facilitate focusing.
Images are projected to the back of the eye (focal points)
The lens reverses the image - objects are seen upside-down
The lens is connected to ciliary bodies (suspensory ligaments) that contract and relax to change the shape of the lens

43
Q

Problems with Focusing

A

Myopia
Hyperopia
Astigmatism

44
Q

Myopia

A

Eye slightly longer, nearsighted

45
Q

Hyperopia

A

Eye shorter, farsighted

46
Q

Astigmatism

A

irregularities in cornea or lens