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Anatomy Lec > Special Senses part 1 > Flashcards

Special Senses part 1 Flashcards

1
Q

General senses of touch

A

Temperature
Pressure
Pain

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2
Q

The Special senses are

A

Smell
Taste
Sight
Hearing
Equilibrium

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3
Q

70 percent of all sensory receptors are in the

A

Eyes

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4
Q

How many percent of sensory receptors does the yes have?

A

70%

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5
Q

Each eye has over a million

A

Nerve fibers

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6
Q

2 Protection for the eye are

A

bony orbit & fat cushion

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7
Q

Most of the eye is enclosed in a

A

bony orbit

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8
Q

A cushion of ____ surrounds most of the eye

A

fat

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9
Q

a fold of skin that closes over the eye to protect it

A

Eyelids

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10
Q

protect the eye from debris, dust, and small particles

A

Eyelashes

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11
Q

modified sebacious glands produce an oily secretion to lubricate the eye

A

Meibomian glands

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12
Q

The purpose of oily secretions in the eye is to

A

Lubricate it

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13
Q

modified sweat glands between the
eyelashes

A

Ciliary glands

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14
Q

A Membrane that lines the eyelids. It Connects to the surface of the eye and secretes mucus to lubricate the eye.

A

Conjunctiva

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15
Q

4 subparts of the Lacrimal apparatus are

A

Lacrimal gland
Lacrimal canals
Lacrimal Sac
Nasolacrimal Duct

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16
Q

It produces lacrimal fluid

A

Lacrimal gland

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17
Q

I drains lacrimal fluid from eyes

A

Lacrimal canals

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18
Q

It provides passage of lacrimal fluid towards nasal cavity

A

Lacrimal sac

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19
Q

It empties lacrimal fluid into the nasal cavity

A

Nasolacrimal duct

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20
Q

lacrimal fluid is composed of

A

Dilute salt solution (tears)
antibodies
lysozyme

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21
Q

The lacrimal fluid has an __________ property

A

antibacterial

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22
Q

It Protects, moistens, and lubricates the eye. It also Empties into the nasal cavity

A

Lacrimal Apparatus

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23
Q

Muscles attach to the outer surface of the eye which Produce eye movements

A

Extrinsic Eye Muscles

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24
Q

The wall of the eye has three tunics which are

A

Fibrous tunic
Choroid
Sensory tunic

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25
Q

The outer layer wall of the eye

A

Fibrous tunic

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26
Q

The middle layer wall of the eye

A

Choroid layer

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27
Q

The inside layer wall of the eye

A

Sensory tunic

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28
Q

The two fibrous Tunics are

A

Sclera
Cornea

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29
Q

A fibrous tunic which is a White connective tissue layer. It is Seen anteriorly as the “white of the eye”

A

Sclera

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30
Q

Sclera is Seen ___________ as the “white of the eye”

A

anteriorly

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31
Q

A Transparent, central anterior portion which Allows for light to pass through.

A

Cornea

32
Q

It is the only human tissue that can be transplanted without fear of rejection and could also repairs itself easily

A

Cornea

33
Q

A Blood-rich nutritive tunic which has
Pigment to prevent light from scattering

A

Choroid Layer

34
Q

Choroid Layer has interiorly has 2 structures

A

Cilliary body
Iris

35
Q

An interior smooth muscle of the choroid layer

A

Cilliary body

36
Q

A Pigmented layer that gives eye color which is a part of the choroid layer

A

Iris

37
Q

A rounded opening in the iris

A

Pupil

38
Q

Sensory Tunic is also known as

A

Retina

39
Q

The receptor cells in the Retina are called

A

Photoreceptors

40
Q

The two types of receptor cells in the Retina

A

Rods
Cones

41
Q

The Signals pass from photoreceptors via a __________ ________

A

two-neuron chain

42
Q

the 2 neurons involved inthe 2-neuron chain are

A

Bipolar neurons
Ganglion cells

43
Q

Signals leave the retina toward the brain through the

A

Optic Nerve

44
Q

This photoreceptors are Mostly found towards the edges of the retina which Allow dim light vision and peripheral vision. Its Perception is all in gray tones

A

Rods

45
Q

It Allow for detailed color vision

A

Cones

46
Q

The cones are Densest in the center of the

A

Retina

47
Q

An area of the retina with only cones

A

Fovea centralis

48
Q

No photoreceptor cells are at the ____ ___ or ______ ____

A

optic disk, or blind spot

49
Q

There are three types of cones which are

A

Red-sensing cones (60 percent)
Green-sensing cones (30 percent)
Blue-sensing cones (10 percent)

50
Q

is the result of lack of one cone type

A

Color Blindness

51
Q

A Biconvex crystal-like structure
that Held in place by a suspensory ligament attached to the ciliary body.

A

Lens

52
Q

The 2 Internal Eye Chamber Fluids are

A

Aqueous humor
Vitreous humor

53
Q

A Watery fluid found in chamber between the lens and cornea

A

Aqueous humor

54
Q

Aqueous humor is Similar to

A

Blood Plasma

55
Q

Aqueous humor Helps maintain

A

Intraocular Pressure (IOP)

56
Q

Aqueous humor Provides nutrients for the

A

Lens and Cornea

57
Q

Aqueous humor can be Reabsorbed into venous blood through the ______ ___ _________

A

canal of Schlemm

58
Q

deoxygenated blood that flows from tiny capillary blood vessels within the tissues into progressively larger veins to the right side of the heart.

A

venous blood

59
Q

A Gel-like substance behind the lens
ehich Keeps the eye from collapsing. It Lasts a lifetime and is not replaced

A

Vitreous humor

60
Q

Light must be focused to a point on the ______ for optimal vision

A

retina

61
Q

The eye is set for distance vision of over

A

20 ft away

62
Q

It must change shape to focus for closer objects

A

Lens accomodation

63
Q

the passageway of light

A

visual pathway

64
Q

Too much IOP

A

Glaucoma

65
Q

each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye

A

Optic Nerve

66
Q

Optic nerve crosses at the

A

Optic Chiasma

67
Q

the part of the brain where the optic nerves cross and is therefore of primary importance to the visual pathway.

A

Optic Chiasma

68
Q

a bundle of nerve fibers that serves to carry visual information from the optic chiasm to the left and right lateral geniculate bodies as a part of the visual pathway.

A

Optic tracts

69
Q

It is where the axons form optic radiation

A

Thalamus

70
Q

the primary cortical region of the brain that receives, integrates, and processes visual information relayed from the retinas

A

Visula cortex

71
Q

The lobe wherein receives, integrates, and processes visual information

A

Occipital lobe

72
Q

Internal muscles are controlled by the

A

autonomic nervous system

73
Q

Bright light causes pupils to constrict through action of

A

radial and ciliary muscles

74
Q

Viewing close objects causes

A

accommodation

75
Q

External muscles control eye movement to

A

follow objects

76
Q

Viewing close objects causes ________. It is where the eyes move medially

A

Convergence

Anatomy Lec (18 decks)

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