Eyes Flashcards

1
Q

Sensory receptors

A

Monitor conditions outside of body

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2
Q

Special senses

A

Olfaction Gustation vision equilibrium (balance) audition (hearing)

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3
Q

General senses

A

Temperature pain touch pressure vibration proprioception (body position)

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4
Q

Nociceptors

A

Pain receptors in skin joints bones and vessels

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5
Q

Fast pain

A

Carries by myelinated fibers

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6
Q

Slow pain

A

Carried by in myelinated fibers

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7
Q

Thermoreceptors

A

Temperature receptors in skin muscles liver and brain

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8
Q

Tactile receptors

A

Touch receptors in skin

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9
Q

Baroreceptors

A

Pressure receptors in organs

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10
Q

Proprioreceptors

A

Position receptors in joints tendons and ligaments

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11
Q

Chemoreceptors

A

Detect dissolved chemicals

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12
Q

Sty

A

Infection in sebaceous gland of hair follicle

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13
Q

Conjunctiva

A

Tissue that lines eyelids and continues on to the eye up the cornea. Infection is called pinkeye

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14
Q

Three tunics of the eye

A

Fibrous (outer)
Vascular (many blood vessels)
Nervous ( inner with many neurons)

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15
Q

Sclera

A

In fibrous layer
White of eye
Protects + attachment for muscles

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16
Q

Cornea

A

In fibrous layer and transparent

17
Q

Choroid

A

In vascular layer
brown membrane lining the Sclera
Absorbs light

18
Q

Ciliary body

A

In vascular layer and connected to lens by ligaments

made of smooth muscle

19
Q

Iris

A

In vascular layer

Colored part regulating amount of light

20
Q

Pupil

A

In vascular layer
opening in the Iris
Black dot

21
Q

Lens

A
In vascular layer 
Behind pupil and iris
Transparent when healthy
Controls shape of eye as it focuses
Cataracts=milky colored=unhealthy 
Shape changed by accommodation
Separate eye into anterior/posterior
22
Q

Aqueous humor

A

Watery fluid in chambers of anterior eye and is continuously recycled
Absorbed into canal is shlemm

23
Q

Glaucoma

A

High eye pressure

24
Q

Vitreous humor

A

Gel fluid in posterior cavity and is not recycled through bloodstream

25
Retina
Part of nervous layer lines the posterior wall Detects light and transports impulses to the optic nerve Made of photoreceptor cells (nearest choroid) and bipolar neurons and ganglion cells(inner layer)
26
Photoreceptors
In retina Respond to light Rods cells (sense light) Cone cells (sense color but need more light)
27
Bipolar neurons
In retina | Transmit signal to inner layer made of ganglion cells
28
Ganglion cells
Have large axons forming the optic nerve
29
Optic disc
Blind spot where images are focused
30
Macula lutea
Yellowish spot near center of retina containing fovea centralis
31
Fovea centralis
Depression full of come cells
32
Emmetropic
Normal eye
33
Myopia
Eye is too long image focused in front of the retina distant objects blurred nearsightedness fixed with a concave lens
34
Hyperopia
Farsightedness image focused behind retina eye too short fixed with convex lens