EYES Flashcards
Embryonic origin of sclera
b. Surface Ectoderm
c. Neural endoderm
d. Neural Ectoderm
e. Mesoderm
Mesoderm
Embryonic origin of Sphincter pupillae
f. Surface Ectoderm
g. Neural endoderm
h. Neural Ectoderm
i. Mesoderm
Neural ectoderm
Where is the region associated with maximum visual acuity?
a. Lamina vitrea
b. Optic disc
c. Cilliary body
d. Lamina cribrosa
e. Fovea centralis
Fovea Centralis
Which layer of the cornea is acellular?
a. Endothelium
b. Epithelium
c. Substantia propria
d. Descemet’s membrane
Descemet’s membrane
What type of epithelium is on the surface of the cornea?
a. Simple squamous
b. Simple columnar
c. Simple cuboidal
d. Stratified squamous
Stratified squamous
It refers to the suspensory ligament of the lens?
a. Zonular fibers
b. Collagen fibers
c. Spiral ligament
d. Elastic fibers
Zonular fibers
What is the anterior pigmented portion of the retina called?
a. Choroid
b. Ciliary body
c. Iris
d. Ora serrata
e. Sclera
Ora serrata
What type of glands are the glands of Moll?
a. Endocrine gland
b. Apocrine sweat gland
c. Oil gland
d. Sebaceous glands
e. Eccrine sweat gland
Apocrine sweat glands
What is the vascular pigmented structure?
a. Choroid
b. Ciliary body
c. Iris
d. Ora serrata
e. Lens
Choroid
Which of these function for color perception?
a. Ganglion cells
b. Horizontal cells
c. Bipolar cells
d. Rods
e. Cones
Cones
Which structure is transparent?
a. Choroid
b. Ciliary body
c. Iris
d. Ora serrata
e. Cornea
Cornea
Which layer forms the majority of the cornea?
a. Epithelium
b. Endothelium
c. Descemet’s membrane
d. Substantia propria
e. Bowman’s membrane
Substantia propria/corneal stroma
Which layer of the cornea is acellular?
a. Epithelium
b. Endothelium
c. Bowman’s membrane
d. Substantia propria
e. None of the above
Bowman’s membrane
What makes up the bulk of the cornea?
a. Purkinje fibers
b. Myofibrils
c. Elastic fibers
d.Collagen fibers
Collagen fibers
What structure is avascular?
A. Sclera
B. Retina
C. Cornea
Cornea
What is the most anterior portion of the uvea?
a. Choroid
b. Ciliary body
c. Iris
d. Ora serrata
e. Sclera
Iris
What is responsible for adjusting the lens?
a. Choroid
b. Ciliary muscle
c. Iris
d. Ora serrata
e. Sclera
Ciliary muscle
The iris is composed of several tissue types. Most of the visible portion is composed of:
a. Nervous tissue
b. Dense fibrous connective tissue
c. Loose connective tissue
d. Epithelial tissue
Loose connective tissue
Which of the following is a type of neuron found in the inner coat of the eye:
a. Cones
b. Ganglion cells
c. Rods
d. Pigmented epithelium
Ganglion cells
Which layer forms the majority of the cornea?
a. Bowman’s membrane
b. Stroma
c. Endothelium
d. Epithelium
e. Descemet’s membrane
Stroma
The cells which secrete aqueous humor represent and extension of which layer:
a. Corneal endothelium
b. Corneal epithelium
c. Pigmented epithelium
d. Stroma
Pigmented epithelium
Chief refractive element
Cornea
Suspended by zonules of Zinn
Lens
Acts as shock absorber
Vitreous body
Which of the following is false about the lens?
a. It is avascular
b. It is transparent and biconvex
c. The lens capsule is composed of type IV collagen, elastin, and proteins
The lens capsule is composed of type IV collagen, elastin, and proteins
The layer of cuboidal cells which forms the innermost surface of the cornea is called:
a. Corneal endothelium
b. Decemet’s membrane
c. Pigmented membrane
d. Corneal epithelium
e. Stroma
Corneal endothelium
What type of epithelium is on the surface of the cornea?
a. Simple squamous
b. Simple columnar
c. Simple cuboidal
d. Stratified squamous
Stratified squamous
Maintains shape of the eye
Vitreous body
It is made up of a transparent gel and consists mainly of water.
a. Cornea
b. Lens
c. Aqueous humor
d. vitreous body
e. optic disc
Vitreous body
Able to regenerate
Descemet’s membrane
What is Bruch’s membrane?
a. Ciliary body
b. Optic disc
c. Fovea centralis
d. Lamina vitrea
e. Lamina cribrosa
Laminate vitrea
What are neurons in the retina?
a. Unipolar
b. Pseudounipolar
c. Bipolar
d. Multipolar
e. Both a and b
Bipolar
What is the region called where the optic nerve exits the eye?
a. Os
b. Optic chiasm
c. Lamina cribrosa
d. Optic disc
e. Ora serrata
Optic disc
What is the space anterior to the iris?
a. Anterior chamber
b. Posterior chamber
c. Vitreal cavity
d. Both a and b
e. All of a, b, and c
Anterior chamber
What are the receptors for vision?
a. Rods
b. Cones
c. Bipolar cells
d. Ganglion cells
e. Both a and b
Rods and cones
What are the openings within the sclera which allow nerve fibers to exit?
a. Os
b. Optic chiasm
c. Lamina cribrosa
d. Optic disc
e. Ora serrata
Lamina cribrosa
Which of the following is NOT part of the retina?
a. Receptor cells
b. Neurons
c. Pigmented epithelium
d. Ciliary body
e. Supporting cells
Ciliary body
What is the inner layer of the choroid?
a. Ciliary body
b. Optic disc
c. Fovea centralis
d. Lamina vitrea
e. Lamina cribrosa
Lamina vitrae
Where does aqueous humor from anterior chamber collect into?
a. Canaliculi
b. Canal of Hering
c. Canal of Muller
d. Canal of Descemet
e. Canal of Schlemm
Canal of Schlemm
How many layers of tissue compose the eyeball?
a. 1
b. 2
c. 3
d. 4
e. 5
3
Which structure is part the uvea?
a. Ora serrata
b. Pigmented epithelium
c. Cornea
d. Sclera
e. Ciliary body
Ciliary body
What is the space anterior to the lens?
a. Anterior chamber
b. Posterior chamber
c. Vitreal cavity
d. Both a and b
e. All of a, b, and c
Anterior and posterior chamber
Which one of the following is not found in the retina?
a. Henle’s layer
b. Bipolar cells
c. Amacrine cells
d. Rods
e. Ganglion cells
Henle’s layer
What is the space posterior to the lens?
a. Anterior chamber
b. Posterior chamber
c. Vitreal cavity
d. Both a and b
e. All of a, b, and c
Vitreal cavity
Where on the retina are there no photoreceptors?
a. Ciliary body
b. Optic disc
c. Fovea centralis
d. Lamina vitrea
e. Lamina cribrosa
Optic disc
What is the space posterior to the iris?
a. Anterior chamber
b. Posterior chamber
c. Vitreal cavity
d. Both a and b
e. All of a, b, and c
Posterior chamber
