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Anatomy Lec > Special Senses part 1 > Flashcards

Special Senses part 1 Flashcards

(76 cards)

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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
The outer layer wall of the eye
Fibrous tunic
26
The middle layer wall of the eye
Choroid layer
27
The inside layer wall of the eye
Sensory tunic
28
The two fibrous Tunics are
Sclera Cornea
29
A fibrous tunic which is a White connective tissue layer. It is Seen anteriorly as the “white of the eye”
Sclera
30
Sclera is Seen ___________ as the “white of the eye”
anteriorly
31
A Transparent, central anterior portion which Allows for light to pass through.
Cornea
32
It is the only human tissue that can be transplanted without fear of rejection and could also repairs itself easily
Cornea
33
A Blood-rich nutritive tunic which has Pigment to prevent light from scattering
Choroid Layer
34
Choroid Layer has interiorly has 2 structures
Cilliary body Iris
35
An interior smooth muscle of the choroid layer
Cilliary body
36
A Pigmented layer that gives eye color which is a part of the choroid layer
Iris
37
A rounded opening in the iris
Pupil
38
Sensory Tunic is also known as
Retina
39
The receptor cells in the Retina are called
Photoreceptors
40
The two types of receptor cells in the Retina
Rods Cones
41
The Signals pass from photoreceptors via a __________ ________
two-neuron chain
42
the 2 neurons involved inthe 2-neuron chain are
Bipolar neurons Ganglion cells
43
Signals leave the retina toward the brain through the
Optic Nerve
44
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
Rods
45
It Allow for detailed color vision
Cones
46
The cones are Densest in the center of the
Retina
47
An area of the retina with only cones
Fovea centralis
48
No photoreceptor cells are at the ____ ___ or ______ ____
optic disk, or blind spot
49
There are three types of cones which are
Red-sensing cones (60 percent) Green-sensing cones (30 percent) Blue-sensing cones (10 percent)
50
is the result of lack of one cone type
Color Blindness
51
A Biconvex crystal-like structure that Held in place by a suspensory ligament attached to the ciliary body.
Lens
52
The 2 Internal Eye Chamber Fluids are
Aqueous humor Vitreous humor
53
A Watery fluid found in chamber between the lens and cornea
Aqueous humor
54
Aqueous humor is Similar to
Blood Plasma
55
Aqueous humor Helps maintain
Intraocular Pressure (IOP)
56
Aqueous humor Provides nutrients for the
Lens and Cornea
57
Aqueous humor can be Reabsorbed into venous blood through the ______ ___ _________
canal of Schlemm
58
deoxygenated blood that flows from tiny capillary blood vessels within the tissues into progressively larger veins to the right side of the heart.
venous blood
59
A Gel-like substance behind the lens ehich Keeps the eye from collapsing. It Lasts a lifetime and is not replaced
Vitreous humor
60
Light must be focused to a point on the ______ for optimal vision
retina
61
The eye is set for distance vision of over
20 ft away
62
It must change shape to focus for closer objects
Lens accomodation
63
the passageway of light
visual pathway
64
Too much IOP
Glaucoma
65
each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye
Optic Nerve
66
Optic nerve crosses at the
Optic Chiasma
67
the part of the brain where the optic nerves cross and is therefore of primary importance to the visual pathway.
Optic Chiasma
68
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.
Optic tracts
69
It is where the axons form optic radiation
Thalamus
70
the primary cortical region of the brain that receives, integrates, and processes visual information relayed from the retinas
Visula cortex
71
The lobe wherein receives, integrates, and processes visual information
Occipital lobe
72
Internal muscles are controlled by the
autonomic nervous system
73
Bright light causes pupils to constrict through action of
radial and ciliary muscles
74
Viewing close objects causes
accommodation
75
External muscles control eye movement to
follow objects
76
Viewing close objects causes ________. It is where the eyes move medially
Convergence

Anatomy Lec (18 decks)

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