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BIOL 1410 (Anatomy) > Special Senses > Flashcards

Special Senses Flashcards

1
Q

How many layers of fluid-filled sphere does the eye have?

A

3

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2
Q

List the structural features of the eye

A

-fibrous tunic
-vascular tunic
-nervous (sensory) tunic
-lens
-anterior segment
-posterior segment

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3
Q

What are the parts of the fibrous tunic?

A

sclera (white)
cornea (transparent)
conjunctiva

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4
Q

what part of the vascular tunic contains melanin and is highly vascular?

A

choroid

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5
Q

what is the coloured part of the eye?

A

iris

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6
Q

What focuses the lenses?

A

ciliary body

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7
Q

What is the hole in the iris?

A

pupil

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8
Q

What are the three layers of neurons in the eye?

A

Photoreceptors
Bipolar cells
Ganglion cells

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9
Q

What are the two types of photoreceptors?

A

Rods- black + white
Cones- colour

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10
Q

what part of the eye is the area of greatest visual acuity and is where the light focuses?

A

fovea centralis

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11
Q

this has no rods NOR cones, and is where the optic nerve exits the eye

A

optic disc

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12
Q

are lens vascular?

A

no

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13
Q

what are cataracts?

A

clouding of lens

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14
Q

what part of the eye contains aqueous humor and is anterior to the lens

A

anterior segment

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15
Q

posterior segment contains what kind of humor?

A

vitreous humor which is gel-like

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16
Q

What part of the ear conducts sound?

A

external, middle, and inner ear

17
Q

what are the parts of the external ear (3)

A

auricle (pinna) = elastic cartilage covered with skin
external auditory canal (meatus)
tympanic membrane (eardrum)

18
Q

What are the parts of the ear?

A

External Ear
Middle Ear
Inner Ear (labyrinth)
Cochlea
Receptors in Inner ear

19
Q

What are the parts of the inner ear?

A

bony labyrinth
membranous labyrinth

20
Q

what does the bony labyrinth contain? the membranous labyrinth?

A

perilymph, endolymph
IN ORDER

21
Q

What are the parts of the bony labyrinth? What are their functions?

A

semicircular canals = equilibrium
vestibule = equilibrium
cochlea = hearing

22
Q

what are the parts of the membranous labyrinth? where are they located?

A

semicircular ducts = inside canals
utricle + saccule = inside vestibule
cochlear duct = inside cochlea

23
Q

What are the 3 channels of the coils found in the cochlea?

A

scala vestibuli = upper; perilymph
scala tympani = lower; perilymph
cochlear duct = middle; endolymph

24
Q

What are the three membranes of the cochlea?

A

vestibular membrane = b/w cochlear duct and scala vestibuli
basilar membrane = b/w cochlear duct and scala tympani
tectorial membrane = covers hair cells

25
Q

what do hair cells that synapse with neurons do?

A

send impulses to the brain via cranial nerve VIII

26
Q

where do cilia that extend into endolymph embedded?

A

tips are embedded in tectorial membrane for stability

BIOL 1410 (Anatomy) (5 decks)

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