GI TRACT

Question 1

What secretes Gastrin

Answer 1

G cells of the stomach & duodenum

Stimulate HCL from parietyal gland, histamine, pepsinogen scretion, & increased gastric blood flow

Question 2

Where are the chief cells produced?

Answer 2

Stomach

Question 3

Where is pepsinogen secreted from?

Answer 3

Stomach (by chief cells to degrade proteins)

Question 4

What does not secrete bicarbonates?

Answer 4

Chief cells of the stomach

Question 5

Where is intrinsic factor secreted from?

Answer 5

Fundic portion of Stomach (by parietal cells for Vit B12)

Question 6

Stimulate Histamine H2 receptor to make?

Answer 6

parietal cell (release HCl) in the stomach

Question 7

Where is secretin made?

Answer 7

S cells of the Duodenum

Question 8

Where is Lactase made?

Answer 8

Brush Border Membrane

Question 9

Microbilli brush border of Small intestine contains enzymes that split disaccharides lactose, sucrose, & maltose into monosaccharides

Answer 9

Lactose–> Glucose + Galactose
Sucrose–> Glucose + Fructose
Maltose–> Glucose + Glucose

Question 10

Crypts of Lieberkuhn (intestinal glands) are in ?

Answer 10

Lamina propria of small intestine

Question 11

Which sugar is not absorved in small instestine?

a. Ribose
b. Maltose
c. Sucrose
d. Fructose
e. Glucose

Answer 11

b. Maltose

Question 12

Main movement in small intestine is through?

Answer 12

Segmentation

Question 13

Segmentation contractions churning & mixing without?

Answer 13

pushing materials further down

Question 14

What is not absorved in the jejunum?

Answer 14

What is absorbed: iron, Na, K, and Cl

Question 15

___________ is a tissue that attaches the posterior wall of the peritoneal cavity to the jejunum?

Answer 15

Mesentery

Question 16

Difference between colon & all other pars of the digestive system?

Answer 16

Colon does not have villi

Question 17

Which is innervated by Vaugs nerve?

Answer 17

Transverse Colon & Lung

Question 18

Vagus nerve supplies _______________________ to all the organs from the neck down to the second segment of the transverse colon (includes ascending & transverse colon) except the adrenal glands

Answer 18

motor parasympathetic fibers

Question 19

What cells secrete bicarbonate?

Answer 19

Epithelial cells lining the pancreas

Question 20

Centroacinar cell are found in what organ?

Answer 20

Pancreas

Question 21

Centroacinar cells are?

Answer 21

intercalated duct cells, secrete bicarbonate when stimulated by secretion to provide alkaline pH for enzyme activity in the stomach

Question 22

Trypsinogen (pancreatic enzyme, digest proteins) becomes trypsin by

Answer 22

altering N terminal peptide

Question 23

What acts adjunctively with lipase?

Answer 23

Bile