Histology

Question 1

What is the structure of the epidermis

Answer 1

Stratisfied squamous epithelium

(top)
stratum corneum
stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale
Dermis
(bottom)

Question 2

What cells can be in the epidermis

Answer 2

Keratinocytes (95% of epidermal cells)

Langerhans cells (antigen-presenting)

Merkel cells (sensory receptors)

Melanocytes (produce melanin)

Question 3

Whats the difference between thin and thick skin

Answer 3

Based on presence of stratum lucidum

Question 4

What is the basic structure of mucous membranes

Answer 4

Epithelium

Lamnia propria

Question 5

What is the structure of the oral mucosa

Answer 5

Stratified squamous epithelium

Lamina propria

Question 6

What is the difference between lining and masticatory mucosa

Answer 6

Lining
-mobile
-non keratinised
-loose lamina propria with wide submucosa

Masticatory
-The palate and gums
-(para)keratinised
-Thick lamina propria

Question 7

Difference between keratinised and non-keratinised histologically

Answer 7

Non-keratinised will have a flat layer on top with nucleus’s whereas keratinised will have a thin flat layer with no nucleus’s

Question 8

What is gustatory mucosa like

Answer 8

Mucosa of the tongue

Similar to masticatory

Keratinised

Present only on dorsum of tongue

Characterised by papillae, some bearing taste buds

Question 9

What accounts for 10% of epithelial cells

Answer 9

Non-keratinocytes (‘clear’ cells)
-melanocytes
-merkel cells
-langerhans cells