Histology

Question 1

label the histology of the dorsal surface of the tongue

Answer 1

Question 2

what type of epithelium lines the dorsal surface of the tongue?

Answer 2

stratified squamous epithelium

Question 3

what type of muscle fibres underlies the epithelium of the tongue?

Answer 3

skeletal muscle

Question 4

what are A & B and give a reason

Answer 4

A = serous acini
B = mucous acini
- serous acini secrete proteins so they stain strongly with H&E stain.
- mucous acini secrete glycoprotein mucus which stains poorly with H&E.

Question 5

what are D and what is their function?

Answer 5

myoepithelial cell
- contract and expel the secretions of exocrine glands

Question 6

what is the gland shown and why?

Answer 6

• parotid gland
• predominantly serous secretion > stains strongly with H&E.

Question 7

what is the gland shown and why?

Answer 7

sublingual
- secretes mucus so stains poorly with H&E.

Question 8

what is the gland shown and why?

Answer 8

submandibular
- secretes mixed mucous and serous so has a mixed staining profile of both strong and weak.