upper GI tract

Question 1

What is the function of chewing?

Answer 1

Prolong taste experience and defence against resp failure

Question 2

Name the three pairs of saliva glands

Answer 2

Parotid, submandibular and sublingual

Question 3

What is in saliva

Answer 3

Mucins, water, alpha amylase, electrolytes, lysozyme

Question 4

What provides parasympathetic innervation to the salivary glands?

Answer 4

CNVII and CNIX

Question 5

Innervation of parasympathetic nerves to salivary glands results in what?

Answer 5

Profuse watery salivary secretion

Question 6

Sympathetic innervation of salivary glands results in what?

Answer 6

High mucus content (alpha one adrenoceptors) and high amylase content (beta two receptors)

Question 7

What epithelium lines the mucosa of the oesophagus ?

Answer 7

Stratified, non-keratinised, squamous epithelium

Question 8

What type of muscle is present in the upper 1/3 of the oesophagus?

Answer 8

Skeletal muscle

Question 9

What type of muscle is present in the lower 2/3 of the oesophagus?

Answer 9

Smooth muscle

Question 10

Name the three layeres of the muscularis externae of the stomach?

Answer 10

Longitudinal (outer), circular (middle) and oblique (inner)

Question 11

How is the mucosa and submucosa organised in the stomach?

Answer 11

They are folded and will expand on filling