G.I. tract

Question 1

Features of the oesophagus

Answer 1

1. No epithelium in outside layer, squamous near lumen

2. Muscularis mucosaw help to push content of gut

Question 2

Function features of stomach

Answer 2

1. Vit. B12 -> intrinsic factor for absorption
2. Holds 4 litres
3. Food leaves through pyloric sphincter
4. Ruggae increases S.A.

Question 3

The stomach has 3 layers of muscularis externa

Answer 3

Oblique, circular, longitudinal

Question 4

Each cell in the stomach is around

Answer 4

10 microns

Question 5

Epithelium that lines gastric pits

Answer 5

Cuboidal -> mucus secretion

Question 6

The gastric gland produces ____ of gastric juice per day

Answer 6

2-3

Question 7

Parietal tissue in the stomach secretes

Answer 7

HCl

Question 8

Chief cells in the stomach secretes

Answer 8

The enzyme pepsinogen which is a precursor to pepsin

Question 9

Endocrin cells in the stomach produce

Answer 9

Gastrin

Question 10

Permanent ridges in the small intestine

Answer 10

Plicae

Question 11

Crypt of Lieberkulin

Answer 11

Alongside base of villi - secrete intestinal juices

Question 12

What lies between the muscularis externa and serosa in the small intestine?

Answer 12

Myenteric plexus

Question 13

There are more nerve cell driven contractions in the ____ than ____

Answer 13

gut, s.c.

Question 14

____ stain allows a view of nerves

Answer 14

Silver

Question 15

Paneth cells of the villus secrete _____ and _____ and are arranged in ______

Answer 15

lysosomes and phagocytes , patches

Question 16

Function of enterocyte cells

Answer 16

Absorption

Question 17

Features of large intestine

Answer 17

1. Crypts with goblet cells no villli

2. Columnar epithelium : microvilli