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A And P 1 > ch 17 > Flashcards

ch 17 Flashcards

1
Q

special senses

A

smell
taste
vision
balance
hearing

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2
Q

olfaction

A

sense of smell

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3
Q

2 layers of nasal cavity

A

olfactory epithelium
lamina propria

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4
Q

odorants

A

small airborne organic water-soluble or lipid-soluble substances which stimulate the olfactory receptors

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5
Q

olfactory sensory nurons

A

highly modified nerve cells

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6
Q

gustation

A

sense of taste

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7
Q

lingual papillae

A

epithelial projections on the surface of the tongue

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8
Q

filiform papillae

A
  • found on front 2/3 of tongue
    Provide friction to move food around mouth and do not contain taste buds
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9
Q

fungiform papillae

A
  • scattered along the tip and sides of tongue
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10
Q

5 taste discriminations

A

sweet
salty
sour
bitter
umami

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11
Q

palpebral fissure

A

gap that separates the free margins of the upper and lower eyelids

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12
Q

tarsal glands

A

modified sebaceous glands along the inner margin of the eyelid

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13
Q

lacrimal caruncle

A

mass of soft tissue at medial angle of eye, which contains glands producing thick secretions

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14
Q

conjunctiva

A

epithelial membrane of eye

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15
Q

types of conjunctiva

A

palpebral: covers inner surface of the eyelids

bulbar: covers the anterior surface of eye

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16
Q

lacrimal apparatus

A

produces, distributes, and removes tears

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17
Q

lacrimal gland

A

tear gland/produces tears

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18
Q

lacrimal sac

A

collects tears from lacrimal canaliculi

19
Q

nasolacrimal duct

A

conducts tears from the inferior portion of the lacrimal sac to the nasal cavity

20
Q

layers of the eyeball

A
  1. fibrous - outer
  2. vascular - middle
  3. inner layer
21
Q

whats contained in the fibrous layer

A

cornea and sclera

22
Q

whats in the vascular layer (3)

A

iris
cilliary body
choroid

23
Q

inner layer

A

neural layer
pigmented layer

24
Q

sclera

A

white of the eye

25
Q

cornea

A

transparent most anterior part of the eye

26
Q

iris

A

colored part of the eye

27
Q

pupil

A

opening of iris that allows light into the eyeball

28
Q

photoreceptors

A

cells that detect light

29
Q

rods

A

allow for vision when light is low

30
Q

cones

A

provide color vision

31
Q

bipolar cells

A

neurons that synapse with the rods and cones

32
Q

ganglion cells

A

neurons that synapse with bipolar cells

33
Q

horizontal cells

A

form a network that extends across the neural layer at the level of the photoreceptor-bipolar cell synapses

34
Q

amacrine cells

A

form a network that extends across the neural layer at the level of the bipolar ganglion cell synapses

35
Q

optic disc

A

origin of optic nerve
- eyes blind spot, no photoreceptors

36
Q

aqueous humor

A

fluid that circulates within the anterior cavity and diffuses through the posterior cavity

37
Q

vitreous body

A

gelatinous mass in the posterior cavity

38
Q

lens

A

transparent, biconvex, flexible disc that lies posterior to the cornea

39
Q

cataracts

A

loss of transparency in the lens due to injury, U V radiation, drug effects or ageing

40
Q

refraction

A

light is bent as it passes from one medium to another

41
Q

focal distance

A

distance between the center of the lens and the focal point

42
Q

astigmatism

A

the light passing through the cornea and lens is not refracted properly and the visual image is distorted

43
Q

accommodation

A

lens changes shape of eye to provide clear vision
- Becomes rounder to focus on nearby objects
- flattens to focus on far objects

44
Q

visual acuity

A

– clarity of vision compared to a “normal” standard
2020 vision

A And P 1 (41 decks)

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