Histology

Question 1

What does simple squamous epithelium line?

Answer 1

• Inside of blood vessels (endothelium)
• Outside of the lungs (mesothelium)
• Abdominal organs (peritoneum)

Question 2

What does simple cuboidal epithelium line?

Answer 2

• Kidney tubules
• Small ducts (e.g. in the salivary glands)

Question 3

What does simple columnar epithelium line?

Answer 3

• Stomach
• Intestines
• Uterus

Question 4

On what type of epithelium are cilia and microvilli found?

Answer 4

• Simple columnar epithelium

Question 5

What does stratified squamous non-keratinising epithelium line?

Answer 5

mouth, oesophagus, oropharynx and vagina

Question 6

What does stratified squamous keratinising epithelium line?

Answer 6

Thin skin- e.g. the eyelids
Thick skin- sites of the body exposed to excess abrasion e.g. palms of the hand and soles of the feet

Question 7

What does pseudostratified columnar epithelium line?

Answer 7

• The respiratory tract from nasal passage to the level of respiratory bronchiole.
• Trachea and upper part of the respiratory tract.

Question 8

What is urothelium and what does it line?

Answer 8

• It is a specialised stratified epithelium (transitional epithelium)
• It has a surface layer of umbrella cells which serves to render the epithelium waterproof
• Transitions from pseudostratified to stratified (at the surface)
• Lines collecting part of the urinary tract (renal pelvis, ureters, urinary bladder and urethra)

Question 9

Why are lymphocytes smaller than nerve cells?

Why do lymphocytes have so little cytoplasm when compared with nerve cells?

Answer 9

• Small lymphocytes are not metabolically active and are poorly differentiated in comparison with nerve cells.
• As lymphocytes are dormant cells, they have a lesser amount of cytoplasm till stimulated