Final Exam - Digestive System (Part II) & Misc. Qs from Objectives

Question 1

What are the six major types of epithelial cells that line the intestine?

Answer 1

1. enterocytes
2. crypt epithelial cells (undifferentiated)
3. goblet cells
4. paneth cells
5. enterochromaffin (neuroendocrine, argentaffin) cells
6. microfold (M) cells

Even Cows Get Pussy Every Monday

Question 2

These cells are tall and columnar with luminal microvilli; contain surface glycocalyx (houses the digestive and absorptive enzymes)

Answer 2

Enterocytes

Question 3

These cells are progenitor cells that replace all of the other epithelial cell types; little or no digestive capability; have short, sparse microvilli

Answer 3

Undifferentiated crypt epithelial cells

Question 4

What do we observe in this image?

Answer 4

Absorptive enterocytes

Question 5

Identify the structures within the box.

Answer 5

Intestinal crypts

Question 6

Identify the cells indicated by the arrows

Answer 6

Intestinal epithelial stem cells

These are present within the crypts thoughout the GI tract

Question 7

These cells secrete mucus; present in villi and crypts; numbers tend to increase aborally throughout the length of the intestine

Answer 7

Goblet cells

Question 8

Identify the cell

Answer 8

Goblet cell

Question 9

Identify the cell indicated by the arrow

Answer 9

paneth cell

Question 10

Where are enteroendocrine cells found primarily?

Answer 10

the crypts

Question 11

What is the function of M-cells?

Answer 11

Uptake of protein and peptide antigens from the intestinal lumen and transport to the gut-associated lymphoid tissue

Portal of entry for some pathogens

Question 12

Identify the cell indicated by the arrow

Answer 12

M cell

Question 13

The small intestine has villi and intestinal glands also known as __________

Answer 13

Crypts of Lieberkühn

Question 14

Identify ‘A’ in this H&E section of the jejunum

Answer 14

lamina propria

Question 15

Identify ‘B’ in this H&E section of the jejunum

Answer 15

tall cylindrical villi

Question 16

Identify ‘C’ in this H&E section of the jejunum

Answer 16

crypts

Question 17

Identify ‘D’ in this H&E section of the jejunum

Answer 17

submucosa

Question 18

Identify ‘E’ in this H&E section of the jejunum

Answer 18

muscularis: inner circular layer

Question 19

Identify ‘F’ in this H&E section of the jejunum

Answer 19

muscularis: outer longitudinal layer

Question 20

Identify ‘G’ in this H&E section of the jejunum

Answer 20

serosa

Question 21

Identify the structures within the box in this H&E section of the submucosal region of the duodenum

Answer 21

Brunner’s glands (duodenal glands)

only present in the duodenum!

Question 22

Identify the structures within the box.

Where are they found?

Answer 22

peyer’s patches (lymphoid aggregates)

Found in the Ileum

Question 23

Identify ‘A’ in this H&E section of the jejunum.

Answer 23

villus

Question 24

Identify ‘B’ in this H&E section of the jejunum.

Answer 24

submucosa

Question 25

Identify 'C' in this H&E section of the jejunum.

Answer 25

muscularis externa

Question 26

Identify 'D' in this H&E section of the jejunum.

Answer 26

crypts

Question 27

Identify the tissue.

Answer 27

Jejunum

Question 28

Identify the tissue. How the hell do you know?

Answer 28

**large intestine** there are _no villi_ present, but the intestinal crypts are still present as they are in the small intestine.

Question 29

Identify the tissue.

Answer 29

Canine colon

Question 30

Identify the tissue.

Answer 30

colonic mucosa

Question 31

Identify the layer labeled 'A' in this H&E section of the colonic mucosa.

Answer 31

mucosal layer

Question 32

Identify the layer labeled 'B' in this H&E section of the colonic mucosa.

Answer 32

submucosal layer

Question 33

Identify the layer labeled 'C' in this H&E section of the colonic mucosa.

Answer 33

**muscularis mucosae** muscular layer

Question 34

Identify 'A' in this H&E section of colonic mucosa

Answer 34

Crypt (of Lieberkühn)

Question 35

Identify 'B' in this H&E section of colonic mucosa

Answer 35

muscular layer of mucosa

Question 36

parietal cells produce \_\_\_\_\_\_\_\_\_

Answer 36

HCl and intrinsic factor necessary for B12 absorption

Question 37

chief cells release \_\_\_\_\_\_\_\_\_\_\_

Answer 37

pepsinogen "The chief shared his pepsi"

Question 38

*Theses cells* are cells found within Peyer’s patches; transport organisms and particles from the lumen to APCs and lymphocytes (T cells); important in mucosal immunity

Answer 38

M-cells

Question 39

goblet cells produce \_\_\_\_\_\_\_\_\_

Answer 39

mucous

Question 40

mandibular salivary glands secrete \_\_\_\_\_\_\_\_\_

Answer 40

mixed seromucous

Question 41

sublingual salivary glands secrete \_\_\_\_\_\_\_\_\_

Answer 41

mucous or mixed seromucous

Question 42

parotid salivary glands secrete \_\_\_\_\_\_\_\_\_

Answer 42

zymogen granulesin serous or mixed seromucous