Deck 19: Eye and Adnexa

Question 1

Where in the eye is Descemet's membrane located?

A) Beneath the dilator pupillae fibers of the iris
B) Beneath the 'endothelium' of the cornea
C) Beneath the outer epithelium of the cornea
D) Between the inner and outer nuclear layers of the retina
E) Surrounding the lens fibers of the lens

Answer 1

B

Question 2

Muller cells of the eye function to:

A) Absorb stray intraocular light rays via intracellular accumulations of melanin
B) Line the interior surface of the cornea
C) Nourish and support neurons within the retina
D) Phagocytize degraded membranous disks shed from rod cells
E) Secrete aqueous humor

Answer 2

C

Question 3

Meibomian glands are located adjacent to the:

A) Epidermis of the eyelids
B) Ciliary processes
C) Extraocular muscles
D) Nasolacrimal duct of the eye
E) Ora serrata

Answer 3

A

Question 4

What events occur during the process of accommodation?

A) An increased tension on the suspensory ligament (zonular fibers)of the lens
B) Dilation of the canal of Schlemm
C) Flattening of the lens
D) Focusing of light from close objects
E) Relaxation of the ciliary muscle

Question 5

Variations in eye color are determined by the number of pigmented cells in the:

A) Ciliary epithelium
B) Corneal epithelium
C) Corneal stroma
D) Iris epithelium
E) Iris stroma

Question 6

An anatomically unusual cilium is found in which ocular structure?

A) In connective tissue cells of the choroid
B) In rod photoreceptor cells,at the junction of the inner segment with the outer segment
C) On smooth muscle cells of the constrictor pupillae
D) On the surface of epithelial cells of the ciliary processes
E) Projecting from pigment epithelial cells of the retina

Question 7

Glaucoma is caused by:

A) Blocked outflow from the anterior chamber into the trabecular meshwork
B) Blocked outflow from the canal of Schlemm into the scleral veins
C) Blocked outflow from the posterior chamber into the anterior chamber
D) Blocked outflow from the trabecular meshwork into the canal of Schlemm
E) Secretion of too much aqueous humor

Question 8

Aqueous humor is secreted by cells of the:

A) Canal of Schlemm
B) Ciliary processes
C) Iris
D) Pigment epithelium
E) Trabecular meshwork

Question 9

The highest concentration of cone cells in the retina can be found in which region?

A) Conjunctiva
B) Fovea
C) Limbus
D) Optic disk
E) Ora serrata