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E: BIO 107 > Bio107-ch15EYE > Flashcards

Bio107-ch15EYE Flashcards

(57 cards)

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1
Q

Sensory receptors provide

A

external and internal environmental information to the CNS

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2
Q

Sensory receptors act as

A

transducers

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3
Q

Transducers convert

A

energy into depolarization

through action potential

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4
Q

Receptors produce _____ potentials that may stimulate ______ potentials

A

graded

action

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5
Q

Sensory receptors are ______ selective

A

highly

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6
Q

Chemoreceptors

A

detect changes in chemical environment

taste buds, olfactory epithelium

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7
Q

Photoreceptors

A

detect light

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8
Q

Thermoreceptors

A

temperature

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9
Q

Mechanoreceptors

A

mechanical distortion or pressure

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10
Q

Propioceptors

A

position of muscles and joints

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11
Q

Nociceptors

A

pain

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12
Q

Osmoreceptors

A

solute concentration

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13
Q

Sensory adaption/receptor ______ its response to stimulus over time

A

decreases

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14
Q

Tonic adaption

A

receptors do NOT adapt or adapt slowly

pain receptors

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15
Q

Phasic adaption

A

receptors ADAPT rapidly

odor, touch

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16
Q

The eye:

Light perception

A

rods and cones in retina

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17
Q

Light regulation

A

iris

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18
Q

Accommodation

A

focus

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19
Q

Interpretation

A

CNS

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20
Q

In the eye, light rays enter through the _____, then pass to the ______

A

cornea

retina

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21
Q

Fovea centralis (3)

A
  1. focal point at the back of the eye
  2. has the greatest acuity
  3. cont. only CONES
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22
Q

Sclera

A

white part of eye

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23
Q

Choroid

Study These Flashcards
A

contains a lot of blood vessels

dark/black outline in pic

24
Q

Retina

Study These Flashcards
A

contains the rods that take in light

25
Optic Nerve
blind spot because there's no rods/cones a cranial nerve
26
Suspensory ligament (3)
1. helps stretch or relax ligaments 2. helps determine light 3. invuluntary
27
Iris
1. colored part | 2. determined by MYLONALYTES
28
Anterior chamber
front space of eye
29
Posterior chamber
back space of eye
30
Cornea
clear lens
31
Pupil
1. a hole/black tunnel | 2. where the light travels through to the fovea
32
Lens
suspense the eye
33
Aqueous humor
clear as you get older or diseased it can turn grey
34
Vitreous humor
helps deal with pressure in the eye
35
Refraction
bending of light rays
36
Refracted first by the _____ then by the _____
cornea | lens
37
Visual Axis
straight through the eye and to the back light rays that pass directly to the central fovea follow this
38
Accomodation
focusing of the lens for clearer vision
39
Distance vision the lens is
FLAT from front to back
40
Near vision the lens is
THICK from front to back
41
Contraction makes the lens
thicker close = contraction
42
Relaxation pulls the lens
flat distance = relaxation
43
Myopic eye
nearsighted
44
Hyperopic eye
farsighted
45
Emmetropic
normal, healthy eye, perfect vision
46
Abstigma
abnormal in the cornea and/or lens
47
Iris deals with
light regulation and regulates the size of the pupil
48
Contracted iris
small pupil size
49
Dilated iris
larger pupil size
50
Light is perceived by (2)
1. Visual Rods | 2. Visial Cones
51
Rhodopsin
photopigment (visual purple) in RODS*
52
Things about RODS (5)
1. High sensitivity- helps at night time 2. More photopigment 3. Slow response, long integration time 4. Low acuity- does NOT help you see 5. Achromatic- ONE type of ROD pigment
53
Things about CONES (5)
1. Low sensitivity- for day vision 2. Less photopigment 3. Fast response, short integration time 4. High acuity 5. Chromatic- 3 types of CONES each with a different pigment
54
Role of Vitamin A (4)
1. eye health 2. effects rods more than cones 3. night blindness 4. causes a decrease in retinal
55
Color vision: | 3 types of cones
1. blue cone 2. green cone 3. red cone
56
If missing one of the 3 types of CONES, then
colorblind
57
Colorblindness is passed along the
X chromosome mostly men are affected

E: BIO 107 (17 decks)

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