GI Physiology

Question 1

What initiates the chemical breakdown of carbs and starches into maltose?

Answer 1

Salivary amylase

Question 2

What cells of the gastric glands in the stomach secrete pepsinogen?

Answer 2

chief cells

Question 3

What does pepsinogen break down?

Answer 3

Proteins

Question 4

What cells of the gastric glands in the stomach secrete HCl and Intrinsic factor?

Answer 4

Parietal cells

Question 5

Which of the 2, HCl or intrinsic factor, is needed for the absorption of B12?

Answer 5

Intrinsic factor

Question 6

What cells of the gastric glands in the stomach release histamine?

Answer 6

Mast cells

Question 7

What stimulates the release of Secretin in the small intestine?

Answer 7

Chyme

Question 8

What does the presence of fat in the duodenum stimulate the release of from the I-cells and causes the gallbladder to contract and the Sphincter of Oddi to relax?

Answer 8

CCK

Question 9

What does maltase breakdown maltose into?

Answer 9

glucose + glucose

Question 10

What does Lactase breakdown lactose into?

Answer 10

glucose + galactose

Question 11

What does sucrase breakdown sucrose into?

Answer 11

glucose + fructose

Question 12

Which cells make up the majority of the Pancreas, exocrine or endocrine cells?

Answer 12

Exocrine cells

Question 13

Which intestine is most of the water in food absorbed?

Answer 13

Large intestine

Question 14

What is a byproduct of RBC breakdown in the spleen?

Answer 14

Bilirubin

Question 15

How much urobilinogen is absorbed back into the blood stream and returned to the liver?

Answer 15

90%

Question 16

What stores and concentrates bile?

Answer 16

Gallbladder

Question 17

What is from G-cells, stimulates gastric motility, and stimulates HCl and intrinsic factor secretion?

Answer 17

Gastrin