histology special senses (test 3)

Question 1

What is connected to each of the semicircular canals?

Answer 1

ampullae

Question 2

What special sensory organ is located in the ampullae of the semicircular canals? What are the components?

Answer 2

Crista

see picture for components

Question 3

What are the utricle and saccule responsible for?

Answer 3

utricle - horizontal movement

saccule - verticle movement

Question 4

name the blanked out parts

Answer 4

Question 5

there are two special sensory organs in the vestibular system, the crista and the macula. Where are they found?

Answer 5

cristae are found in the ampulae

maculae are found in the utricle and the saccule

Question 6

What are we looking at (Hint: it is an organ in the vestibular system)

Answer 6

macula (in either the utricle or succule)

Question 7

What are we looking at (Hint: it is an organ in the vestibular system)

Answer 7

Crista (inside the ampulla)

Note: the histology slide does not show the cupula

Question 8

What are the 3 chambers of the cochlea? Which two are continuous?

Answer 8

Scala vestibuli

scala media

scala tympani

scala vestibuli and scala tympani are continuous

Question 9

what type of fluid is found in the scala vestibuli, scala media, and scala tympani

Answer 9

scala vestibuli (perilymph)

scala media (endolymph)

scala tympani (perilymph)

Question 10

What secretes endolymph into the scala median?

Answer 10

the spiral limbus and the secreting epithelium

Question 11

What are the 3 general layers of the eye?

Answer 11

fibrous layer

vascular intermediate layer

epithelial innter layer

Question 12

what makes up the fibrous layer of the eye?

Answer 12

sclera and the cornea

Question 13

What makes up the vascular layer of the eye?

Answer 13

choroid, ciliary body, and iris

Question 14

What makes up the epithelial layer of the eye?

Answer 14

neural retina, pigmented epithelium, ciliary epithelium, and iris epithelium

Question 15

From what embryologic structure does the retina arise?

Answer 15

diencephalon

Question 16

What are the 5 layers of the cornea?

Answer 16

1) epithelium
2) Bowman’s membrane
3) stroma
4) Descemet’s membrane
5) Endothelium

Question 17

What are we looking at? Can you name the layers?

Answer 17

Question 18

What are the two layers of the iris?

Answer 18

fibrous/vascular stroma layer

epithelial layer

Question 19

What layer in the iris (stromal or epithelial layer) are vessels, melanocyes, and smooth muscle found?

Answer 19

stromal layer

Question 20

what layer in the iris (stromal or epithelial layer) are the pigmented cuboidal cells?

Answer 20

epithelial layer

Question 21

We’re looking at the iris. Where are the stromal and epithelial layers?

Answer 21

Question 22

Name the letters

Answer 22

arrow = zonular fiber

CP = ciliary process (ciliary epithelium that secretes aqueous humor)

CM = ciliary muscles

SVS = canal of schlem

PC = posterior chamber

VC = vitreous chamber

Question 23

There are two layers of the ciliary epithelium. name them on this slide

Answer 23

PE = pigmented cuboidal epithelium

NE = non-pigmented cuboidal epithelium

Question 24

describe the development of the lens

Answer 24

cells in the anterior part of the lens become cuboidal epithelium

Cells in the posterior lens differentiate to become lens fiber cells. Lens fiber cells are packed with crystallins

Question 25

What is this?

Answer 25

Question 26

What are we looking at? Can you name some of the parts?

Answer 26

retina

NOTE: the picture is flipped in the answer. Don’t get confused

(not sure how much of this we need to know)

Question 27

what are muller glia cells?

Answer 27

phagocytic cells that are “wrapped” around axons of rods and cones

Question 28

There are two sources of blood supply to the retina. Name them

Answer 28

central retinal artery (comes into the eye via the optic nerve)

choroid plexus (highly vascularized)

Question 29

does the fovea receive blood from the central retinal artery, the choroid plexus, or both?

Answer 29

The choroid plexus

Question 30

True of false

The vitreous body is composed of hyaluronic acid and collagen with few hyalocytes

Answer 30

true

Question 31

What are we looking at?

Answer 31

tongue

Question 32

What is the arrow pointing to?

Answer 32

taste bud

Question 33

What are the 5 catagories of taste?

Answer 33

bitter

umami

sweet

sour

salty

(BUSSS)

Question 34

What are we looking at?

Answer 34

olfactory epithelium

Question 35

Beneath olfactory epithelium are bowman’s glands. What is their purpose?

Answer 35

Bowman’s glands release odorant binding proteins (OBP). OBPs bind the odor and then odor/OBP complex bind to the smell receptor