Lecture #25-27 Digestive System

Question 1

What part of the mucosa would you find mucosa associated lymphoid tissue (MALT)?

Answer 1

Lamina Propria

Question 2

Where is the meissner’s plexus?

Answer 2

In the submucosa along with glands and blood and lymph vessels

Question 3

Where would you find the Myenteric / Auerbach’s plexus?

Answer 3

In the muscularis externa.

Function = peristalsis

Question 4

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Question 6

What comprises the PERITONEUM?

Answer 6

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Question 25

What are the 4 parts of the somach?

Answer 25

What are the 4 parts of the somach?

Question 26

What type of epithelium do you find in the stomach?

Answer 26

Simple columnar epithelium with mucos cells invaginated to form gastric pits and glands within the lamina propria

Question 27

What type of cells are found in the epithelium of the stomach?

Answer 27

Question 28

Which cell screte hydrochloric acid?

A. Parietal Cells

B. Chief Cells

C. G Cells

D. Mucus Cells

Answer 28

A. Parietal Cells

Question 29

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Question 46

Which cell scretes secrete gastrin?

A. Parietal Cells

B. Chief Cells

C. G Cells

D. Mucus Cells

Answer 46

C. G Cells

Question 47

Which cell screte gastric lipase?

A. Parietal Cells

B. Chief Cells

C. G Cells

D. Mucus Cells

Answer 47

B. Chief Cells

Question 48

Which cell intrinsic factor?

A. Parietal Cells

B. Chief Cells

C. G Cells

D. Mucus Cells

Answer 48

B. Chief Cells

Question 49

Which cell cecrete pepsinogen that activate pepsin, the activated form, that breaks down proteins into peptides?

A. Parietal Cells

B. Chief Cells

C. G Cells

D. Mucus Cells

Answer 49

B. Chief Cells

Question 50

The small intestins secrete all of the following except?

A. secretins

B. gastrin

C. CCK

D. glucose-dependent insulinotropic peptide

E. intrinsic factor

Answer 50

The stomach secrets gastin and intrinsic factor

The small intestiin sercetes: secretins, CCK, glucose-dependent insulinotropic peptide

Question 51

The small intestines is both retro- and intra-peritoneal. (T/F)

Answer 51

true

Question 52

What types of cells will you find in the duodenum mucosa layer of the epithelium?

Answer 52

Question 53

Identify.

Answer 53

Question 54

Where is this tissue found?

Answer 54

in the duodenum

Question 55

Where would you find this tissue?

What are distinguishing characteristics?

Answer 55

long, branched circular folds, no submucosal glands

Question 56

Which part of the duodenum is intraperitoneal?

Answer 56

The first part is intraperitoneal and the rest is retroperitoneal

Question 57

Where are peyer’s patches found?

Answer 57

in the ileum

Question 58

Which part of the digestive system produces vitamins B & K?

Answer 58

The large intestines

Question 59

Describe the epithelial layers of the large intestines and what are the distinguising features?

Answer 59

•Distinguishing features:

• haustra, tenia coli, epiploic appendages
• abundance of goblet cells, no villi

• Appendix- wormlike structure attached to the cecum, containing large amounts of lymphoid tissue.

Clinical: Appendicitis, Diverticular disease

Question 60

Where is this tissue found?

Answer 60

Question 61

Where would you find each of these tissues?

Answer 61

Left: Large Intestines, Right: Stomach, Top: Duodenum, Bottom: Esophagus

Question 62

Where is the lesser omentum derived from?

Answer 62

The ventral Mesentery

Question 63

Where is the greater omentum derived from?

Answer 63

fromt the dorsal mesentery

Question 64

What are pancreatic digestive juices?

Answer 64

Pancreatic digestive juices cells in clusters called acini

Pancreatic amylase, trypsin, elastase

Question 65

What is the primordial gut developed from?

Answer 65

the splanchnic mesoderm

Question 66

What is the arterial supply of the foregut?

Answer 66

Celiac Trunk

Question 67

Identify.

Answer 67

Question 68

What structures are derived from the foregut in organogenesis?

Answer 68

Question 69

What is the areterial supply for the midgut?

What structures were derived from the midgut during organogenesis?

Answer 69

Question 70

What is the areterial supply of the hindgut?

What structures are derived from the hindgut in organogenesis?

Answer 70

Question 71

Describe the developemnt of the liver.

Answer 71

Question 72

Describe the development of the pancreas.

Answer 72

Pancreas develops from two endodermal buds (ventral & dorsal) from the distal end of the foregut
•Dorsal bud appears first [26th day]

• Ventral bud appears on the 28th day
• Rotation & fusion by the 7th week

Question 73

Where does the endoderm meet the ectoderm?

Answer 73