Digestion and Absorption

Question 1

When does MMC occur?

Answer 1

following emptying of stomach contents into small intestine

Question 2

What triggers MMC?

Answer 2

motilin

Question 3

What is MMC specific to?

Answer 3

small intestines, does not exist in large intestines

Question 4

What does the large intestines have that is similar to MMC?

Answer 4

mass movement

Question 5

Jejunum vs ileum: who has the greater surface area ?

Answer 5

duodenum and jejunum have highest “carpeting” and therefore more surface area

Question 6

Does the same absorptive surface carry into large intestines?

Answer 6

no

Question 7

Where do you find crypts? where do you find villi?

Answer 7

villi= small intestine
crypts= both the large and small intestines

Question 8

What is the role of crypts?

Answer 8

rejuvenation; the whole GI tract turns over in 5 days. The cell divisions push out of the crypt (new cells) then the new stem cells differeniate into absorption epitheliums or mucous secretors.

Question 9

What is the most commonly absorbed food?

Answer 9

carbs! then protein, then fat

Question 10

Give examples of monosacchrides

Answer 10

glucose, galatose and frutose

Question 11

Where is the breakdown of carbs occurring?

Answer 11

inbetween the fingers of the “shag rug” which is where the enzyme is