Test 201  (Ocular anatomy)
1. The following are true about the photoreceptors:
a. the rods have a longer segment than the cones

b. the synaptic terminals of the photoreceptors are
    located in the inner plexiform layer

c. the outer segment of the photoreceptors are orientated 
    with their long axes towards the pupil

d. the inner segment of the photoreceptors has a diameter 
    that is smaller than the outer segment

e. the photoreceptors received nutrients from the 
    choroidal circulation


2. Regarding the photoreceptors:

a. pedicle is the synaptic terminal of the rods

b. the synaptic terminal of rod has more invaginations 
    than the cones 

c. ellipsoid is the mitochondrial rich area of the 

d. the region containing the nucleus is called the myoid

e. unlike the cones, the distal outer segment of the rods 
   are not in direct communication with the extracellular 

3. Descemet's membrane:
a. is an acellular layer

b. is absent at birth

c. is produced after birth by the keratocytes of the stroma

d. is 5X thicker in old age than in youth

e. is continuos with the Schwalbe's line at the limbus

. 4. The ciliary body:
a. contains a bilayer cuboidal epithelium

b. contains epithelium which is continuos with 
    the neuroretina

c. becomes more anteriorly located with time

d. shows atrophy with age

e. contracts when the eyes are focused at a distant object

5. The following are true about the cornea:

a. the peripheral cornea has twice the thickness of 
    the central cornea

b. it has a density of nerve endings which is 300 times
    that of the epidermis

c. it is more curved centrally than peripherally

d. it is more curved in the horizontal than the vertical axis

e. it has a refractive index of 1.36

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