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Anatomy Exam II > Orbit II > Flashcards

Orbit II Flashcards

1
Q

primary refractor of light

A

cornea

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2
Q

secondary refractor of light

A

lens

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3
Q

3 layers of eye

A

Sclera
Choroid (w/ blood vessels and nerves)
Retina

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4
Q

What creates aqueous humor?

A

ciliary processes

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5
Q

Drainage of eye

A

canal of Schlemm

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6
Q

Blockage of trabecular network

A

glaucoma. pressure builds can’t drain

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7
Q

2 types of glaucoma

A

open angle

angle closure

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8
Q

how do you actively dilate the iris?

A

dilator pupillae (via sympathetic ns)

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9
Q

Ciliary muscle and sphincter pupillae are both

A

circular and parasymp

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10
Q

Sympathetic muscles (dilator pupillage) in iris are

A

radially oriented

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11
Q

10-12 feet away (Far away refraction)

A

cornea

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12
Q

looking at things up close

A

need to thicken lens up, so that light falls on back on retina

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13
Q

Meridional fibers

A

counteract circular fibers

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14
Q

Nuclei of lens and age?

A

decrease with age

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15
Q

The ciliary muscle is innervated by

A

parasympathetic only (causes lens to THICKEN)

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16
Q

Postremal chamber

A

vitreous humor. also there’s the hyaloid canal.

17
Q

cells spaning inner to outer limiting membrane

A

mueller cells

18
Q

what layer is touching VB

A

inner limiting membrane

19
Q

how do rods/cons get metabolic support?

A

not from mueller cells. pigmented epithelium blood supply. this is where detached retina happens.

20
Q

3 differences between rods and cones

A
  1. surface area difference (check)
  2. shape like cone
  3. cone has wide foot (synaptic bouton)
21
Q

when is the 1st AP in eye?

A

ganglion cells. not rods/cons.

22
Q

fewest number of neurons to get to ganglion is

A

3

23
Q

only cones here

A

fovea

24
Q

no blood vessels where

A

fovea

25
Q

no photoreceptors here

A

optic disc (blind spot)

26
Q

tell me about vasculature inside a nerve

A

central vein and artery or retina runs in CN III

27
Q

medial portion of the retina

A

blind spot

28
Q

lowest pressure thing going through optic nerve

A

VEIN. pressure constricts is…causing it to dilate…or something

29
Q

Roof of mouth sensory

A

V2

30
Q

What lies between the palatoglossus and the palatopharyngeus?

A

Palatine tonsil

31
Q

What muscles prevent food from coming up your nose?

A

Levator veli palatini, and the tensor veli palatini

these raise the soft palate

32
Q

What innervates the palatoglossus m.?

A

CN X

33
Q

What innervates Tensor veli palatini?

A

CN V3

34
Q

What muscles flatten the tongue out?

A

Vertical muscles

35
Q

Muscles that touch tongue to nose

A

superior long. muscle

36
Q

Curl tongue down

A

Inf. long. muscle

37
Q

What structure travels underneath the submandibular duct?

A

The Lingual nerve

Anatomy Exam II (5 decks)

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