Saliva

Question 1

Importance of saliva

Answer 1

Oral hygiene, wash, immunity, buffer, digestive enzymes

Question 2

Is the parotid gland serous or mucous?

Answer 2

Serous

Question 3

The submandibular and sublingual glands are both

Answer 3

mucous and serous

Question 4

Lots of new research into saliva testing

Answer 4

Potential use for testing for hormones, TB, cystic fibrosis, LFT for alcohol testing and for Covid.

Question 5

Structure of salivary glands

Answer 5

Acinar cells (make saliva) and ducts (carries it into mouth)

Question 6

2 Types of acini

Answer 6

Serous (dark staining, small central duct, secrete water and alpha amylase) and mucous (pale staining, ‘foamy’, large central duct secrete mucous)

Question 7

Intercalated intralobular ducts

Answer 7

Short narrow duct segments with cuboidal cells that connect acini to larger striated ducts

Question 8

Striated intralobular ducts

Answer 8

Striated, major site for reabsorption of NaCl.
Basal membrane highly folded into microvilli, many mitochondria, active transport of HCO3 against conc. gradient.

Question 9

Ducts secrete K+ and HCO3- and reabsorb…

Answer 9

Na+ and Cl-

Question 10

Where are minor salivary glands found?

Answer 10

Lips, cheeks, hard and soft palate, tongue

Question 11

Xerostomia

Answer 11

Dry mouth, could be due to cystic fibrosis or medication or irradiation head and neck cancers)

Question 12

Stimulation of ___ nerves causes the production of saliva

Answer 12

Parasympathetic

Question 13

Sympathetic stimulation selectively causes secretion of __ and ___.

Answer 13

Protein and glycoprotein