Histology - Microanatomy of the eye Flashcards
which component of the eyelid lies closest to the skin
a.orbicularis muscle
b.conjunctiva
c.accessory lacrimal glands
d. meibomian glands
e.tarsal plate
a.orbicularis muscle
which part of the eyelid produces lipid rich secretions that prevent tears from evaporating
a.orbicularis muscle
b.conjunctiva
c.accessory lacrimal glands
d. meibomian glands
e.tarsal plate
d. meibomian glands
which part of the eyelid is made up of dense fibroelastic tissue
a.orbicularis muscle
b.conjunctiva
c.accessory lacrimal glands
d. meibomian glands
e.tarsal plate
e.tarsal plate
what is the correct order of the layers of the eyeball from outer to inner
a.sclera and cornea , retina, uvea
b.uvea, retina, sclera and cornea
c. sclera and cornea, uvea, retina
c. sclera and cornea, uvea, retina
the choroid, cilliary body and what other structure make up the uvea
a.cornea
b.iris
c.sclera
d.retina
b.iris
which of these is a tough dense CT
a.sclera
b.cornea
c.iris
a.sclera
the limbus is the boundary between the sclera and the
a.cilliary body
b.choroid
c. cornea
d.iris
e.pupil
c. cornea
damage to which layer of the cornea causes scar formation and loss of visual acuity
a.epithelium
b.stroma
c.bowmans layer
d. descemets membrane
c.bowmans layer
the cornea is transparent due to the arrangement of what into aligned lamellae and the affinity of the matrix for water
a.keratin
b.collagen
c.fibrin
b.collagen
how many layers does the cornea have
a.3
b.4
d.5
e.6
d.5
ssnk epithelium
bowmans layer
stroma
descemets membrane
corneal endothelium
which layer of the eye is the vascular layer
a.sclera
b.cornea
c.uvea
d.retina
c.uvea
which portion of the uvea contains the cilliary body and dilator and constrictor portion of the iris
a. anterior
b.posterior
a. anterior
the cilliary body muscle regulates the ………….. of the lens
a.size
b.volume
d.tension
d.tension
what produces the aqueous humour
a.epithelium of cilliary processes
b.ssnk of cornea
c.endothelium of cilliary processes
d.accessory lacrimal glands
e.meibomian gland
a.epithelium of cilliary processes
contraction of cilliary muscles causes ………….. of the lens
a.contraction
b.relaxation
b.relaxation
what separates the anterior and posterior chambers of the eyes
a. cornea
b.sclera
c.cilliary bodies
d.iris
d.iris
number of what determine eye colour
a.melanocytes in the anterior limiting layer
b.melanocytes in the stromal layer
c.fibroblasts in the anterior limiting layer
b.melanocytes in the stromal layer
few melanocytes in the stromal layer of the iris gives which eye colour
a.blue
b.green
c.brown
a.blue
the retina has how many layers
a.1
b.2
c.3
d.4
b.2
outer pigmented and inner retinal
what seperates the anterior 1/3 and posterior 2/3 of the retina
a.limbus
b.choroid
c.ora serrata
c.ora serrata
which part of the retina is light sensitive and contains photoreceptor neurons (rods and cones)
a.posterior 2/3
b.anterior 1/3
a.posterior 2/3
which part of the retina is not light sensitive
a.anterior 1/3
b. posterior 2/3
a.anterior 1/3
the inner retinal layer of the retina is made up of how many layers of different cell types
a.5
b.6
c.7
d.8
e.9
e.9
contains the rods and cones
4 groups of cells found in the sensory retina
photoreceptor neurons
conducting neurons
association neurons
neuroglial cells
bipolar and ganglion cells are examples of which cell type found in the retina
a.photoreceptor
b.conducting
c.association
d.neuroglial
b.conducting
horizontal and amacrine cells are examples of which cell type found in the retina
a.photoreceptor
b.conducting
c.association
d.neuroglial
c.association
muller cells are examples of which cell type found in the retina
a.photoreceptor
b.conducting
c.association
d.neuroglial
d.neuroglial
which photoreceptor neurons perceive light intensity
a.rods
b.cones
a.rods
which photoreceptor neurons perceive colour
a.rods
b.cones
b.cones
which cell type are concentrated at the fovea
a.cones
b.rods
a.cones
which cell type are concentrated at the periphery of the retina
a.cones
b.rods
b.rods
at the fovea cones are arranged at an angle and ……… layers of retina do not obstruct the light pathway
a.inner
b.outer pigmented
a.inner
the fovea is found within the …….
a.macula
b.macula densa
c.optic disc
d.retina
a.macula
at which location do axons from ganglion cells merge to form the optic nerve giving a blind spot due to lack of photoreceptors
a.retina
b.macula
c.fovea
d.optic disc
d.optic disc
glaucoma
rise in intraocular pressure
glaucoma
rise in intraocular pressure
blockage of drainage of aqueous humour through the meshwork of the eye leads to glaucoma , damage to the retina and blindness
the lens of the eye has an outer layer of which type of collagen
a. I
B.ii
C.III
D.IV
V
D.IV
