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BIO 301 Lec > Lab Eye (exam 4) > Flashcards

Lab Eye (exam 4) Flashcards

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Biology 101 flashcards
1
Q

Where is the superior rectus muscle?

A

On top of eye

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2
Q

Where is the inferior rectus muscle?

A

Bottom of eye

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3
Q

Where is the medial rectus muscle?

A

Muscle on the nose side

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4
Q

Where is the lateral rectus muscle?

A

Other side of eyeball

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5
Q

Where is the superior oblique muscles?

A

Attaches to superior rectus muscle that goes around next to nose

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6
Q

Where is the inferior oblique muscles?

A

Wraps eye on the bottom

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7
Q

What is the top eyelid called?

A

Superior palpebra

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8
Q

What is the bottom eyelid called?

A

Inferior palpebra

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9
Q

What is the muscle that pulls the top eyelid back?

A

Levator palpebrae superioris muscle

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10
Q

What is the gland that gives tears that’s on the opposite side of what eye it is?

A

Lacrimal gland

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11
Q

What empties in the lacrimal canal (where tears drain) and what side is it on?

A

Nasolacrimal duct

Medial side of nose

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12
Q

What is the clear membrane covering the white part of the eye called?

A

Conjunctiva

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13
Q

What is the white portion of the eye called and what else does it do?

A

Sclera

Holds eye in rigid place

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14
Q

What is the cornea?

A

Transparent curved surface

Clear membrane on top of iris

Focuses Light

First place light bends

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15
Q

What is the black layer under the sclera called?

A

Choroid

Light doesn’t jump around cornea because of this

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16
Q

If the choroid is black and white in color what happens?

A

Black- Absorbs all colors of the rainbow

White- Reflects all colors of the rainbow

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17
Q

What is the muscle called that holds the suspensory ligaments?

A

Ciliary muscle

Changes shape of lens

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18
Q

What is the colored portion of the eye called?

A

Iris

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19
Q

What is the muscle that causes the pupil to constrict and are parasympathetic?

A

Circular muscle

20
Q

What is the muscle that causes the pupil to dilate and are sympathetic?

A

Radial muscle

21
Q

What does the lens do?

A

Adjust to distance of objects like a microscope

Looks like a clear jelly bean

When you focus on something everything else gets blurry

Suspended by suspensory ligaments

22
Q

What holds the lens in place?

A

Suspensory ligaments

23
Q

What is the retina?

A

Light sensitive area where image is captured

Image is originally upside down

24
Q

What are rods?

A

Light sensitive

See black and white and different shades of gray

Pick up dim images

Around edges or retina (peripheral vision)

25
Q

What are cones?

A

See color red, blue and green

Much less sensitive to light

Blend the 3 colors to see other colors

26
Q

What is the yellow dot in the retina called?

A

Macula lutea

27
Q

What is the indent that the yellow dot makes called?

A

Fovea centralis

Have sharpest vision here

28
Q

What is the optic disc?

A

A structure- causes Blind spot

Function- optic nerve and blood vessels pass through

29
Q

What is a blind spot?

A

Spot where you can’t see anything

Right over the optic nerve

No light receptors

Sides of eyes

30
Q

What cranial nerve is the optic nerve?

A

2

31
Q

What is the anterior cavity?

A

Everything in front of lens

32
Q

What is the anterior chamber?

A

Front of iris

33
Q

What is the posterior chamber?

A

Behind iris in front of lens

34
Q

What is the posterior cavity?

A

Behind lens

35
Q

What is the pupil?

A

Hole in front of lens

Where light passes though

Created by iris

36
Q

What drains aqueous humor if not drained there is a lot of pressure?

A

Canal of Schlemn (scleral venous sinus)

37
Q

What is lens accommodation mean?

A

Ability to focus and focus without moving

38
Q

What is convergence?

A

When both eyes follow and focus on an object

39
Q

What is astigmatism?

A

Irregularity in shapes of cornea

40
Q

What is color blindness?

A

Cones don’t work properly or have to many rods

41
Q

What is glaucoma?

A

Pressure under cornea because Cana of schlemn didn’t drain right

42
Q

What is emmetropia?

A

Normal vision

43
Q

What is hyperopia?

A

Light focused behind retina rather that on it

Far sighted

44
Q

What is myopia?

A

Light goes in front of retina instead of on it

Eyeball too long

Cornea too curved

Nearsighted

45
Q

What is presbyopia?

A

Lens loses flexibility and can’t focus on things

Special kind of hyperopia

47
Q

What are photo receptors?

A

Like a pixel

Single dot

Brain puts them together to form an image

49
Q

What are the turnics of the eyeball?

A

3 layers of the eyeball

Retina
Choroid
Sclera
Inside to outside

BIO 301 Lec (27 decks)

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