GI 6

Question 1

the small intestine is divided into 3 sections called…

Answer 1

duodenum, jejunum and illeum

Question 2

what are the major functions of the small intestine

Answer 2

digestion and absorption

Question 3

in what part of the small intestine is there release of endocrine hormones and CCK

Answer 3

duodenum

Question 4

what is absorbed in the duodenum

Answer 4

nutrients, iron and calcium

Question 5

what major vitamin is absorbed in the illeum

Answer 5

B12

Question 6

match the function to the associated cell type in the small intestine

secretion of mucus

Answer 6

goblet cells

Question 7

match the function to the associated cell type in the small intestine

secrete antibacterial proteins

Answer 7

paneth cell

Question 8

match the function to the associated cell type in the small intestine

brush border enzymes

Answer 8

absorptive cells

Question 9

define brush borders

Answer 9

small projections of epithelial cells covering the vili of the small intestine

Question 10

Sucrose is broken into glucose and fructose by what

Answer 10

Sucrose - brush border enzyme

Question 11

Maltose is broken down into glucose by what

Answer 11

Maltase, sucrase

Question 12

List the protein digestion pathway

Answer 12

Proteins broken down by pepsin in stomach
Proteins broken down by pancreatic protease in the small intestine
Broken down into free AS -> absorbed by secondary active transport while coupled to sodium

Question 13

extracellular fat droplets are known as

Answer 13

chylomicrons

Question 14

what do chylomicrons contain

Answer 14

triglycerides, phospholipids, fat soluble vitamins and cholesterol

Question 15

lymphatics enter the systemic circulation through what

Answer 15

the thoracic duct

Question 16

what is ferritin

Answer 16

a protein iron complex that acts as a storage form of iron

Question 17

how much fluid is handled by the GI tract each day

Answer 17

8-9 L

Question 18

where is the majority of fluid reabsorbed

Answer 18

small intestine

Question 19

what are the important electrolytes for water transport

Answer 19

sodium, Cl and HCO3

Question 20

the absorption of water in the small intestine depends on what type of gradient

Answer 20

sodium gradients

Question 21

the activation of what can lead to cholera

Answer 21

the Cl channel

Question 22

what is the treatment for cholera

Answer 22

consumption of water with salt and glucose

Question 23

what is the most common motion in the small intestine

Answer 23

segmentation

Question 24

how many contractions per minute in the duodenum

Answer 24

12

Question 25

how many contractions per minute in the ileum

Answer 25

9