1. True statements about the conjunctiva include: 

a. it is made up of stratified, non-keratinized squamous 
    epithelium

b. the substantia propria is thinnest over the tarsus

c. goblet cells are most numerous in the fornices

d. accessory glands of Kraus produce aqueous layer of
    the tear film

e. accessory glands of Wolfring produce oily layer of
    the tear film
 

Answera.T   b.T   c.T   d.T  e.F
Goblet cells are numerous over the fornices
and plica semilunaris.
Accessory glands in the conjunctiva produce 
aqueous layer of the tear film.

2. Compared with limbal dermoid, dermolipomas: 

a. most frequently occur in the superotemporal quadrant of 
    the fornix.

b. are soften than limbal dermoids

c. have absent dermal adnexal structures

d. are not seen in Goldenhar's syndrome

e. are not seen in linear naevus sebaceous syndrome

Answera.T  b.T   c.T   d.F   e.F
The presence of fatty tissue makes dermolipomas softer than dermoid.
Both conditions occur in Goldenhar's syndrome 
and linear naevus sebaceous syndrome.

3. The following are true fixatives used in histopathology : 

a. 10% formalin is the most commonly used fixative

b. glutaraldehyde is the fixative of choice for electron 
    microscopy

c. ethyl alcohol is suitable for fixating cytology specimen

d. fixatives prevent discoloration of the tissue

e. fixatives prevent autolysis

Answera.T   b.T   c.T   d.F  e.T
10% formalin is the most common fixative
used in histopathology. It prevent post-mortem enzymatic action (autolysis).

4. Mucormycosis of the orbit:

a. usually begins in the sinus

b. causes central retinal artery occlusion

c. commonly causes tissue necrosis

d. is a complication in patients with poorly controlled
    diabetes mellitus.

e. is associated with injury involving vegetation

Answera.T   b.T   c.T   d.T  e.F
Mucormycosis is an air-borne infection which
typically occurs in patients with poor immune 
system such as poorly controlled diabetes mellitus especially those with diabetic ketoacidosis.

a

5. Alcian blue stains the following blue:

a. hyaluronic acid in the vitreous

b. Schnabel's optic atrophy

c. granular dystrophy

d. macular dystrophy

e. lens with pseudoexfoliation syndrome
 

Answera.T   b.T   c.F  d.T  e.F
Alcian blue stains tissue containing  mucopolysaccharide blue.