Enterohepatic circulation Flashcards Preview

A&P 3.2 > Enterohepatic circulation > Flashcards

Flashcards in Enterohepatic circulation Deck (22):
1

What is enterohepatic circulation?

Compounds that are secreted, absorbed, and re-secreted between the liver and the small intestine

2

What are two examples of enterohepatic circulation?

bilirubin, but 80% of bile salts also surrounded by micelle

3

What is bilirubin?

Breakdown product from heme

4

How does bilirubin become water-soluble?

Bilirubin is conugated with gluconic acid

5

Bacteria in gut change conjugated bilirubin into this

Urobilinogen

6

What gives the brown color to feces?

Stercobilin

7

What is jaundice?
What causes it?

Yellow staining of tissues, by blocked bile ducts or liver disease

8

Free bilirubin is not water-soluble. The liver _______ it.

conjugates

9

Can the kidneys excrete bilirubin?

No, it must be changed to Urobilinogen

10

Conjugated bilirubin goes in the ____, into the small intestine

bile

11

Where and how is bilirubin changed to urobilinogen?

By bacteria in the small intestine

12

About __% of urobilinogen stays in the blood through the liver

80%

13

What gives urine its amber color?

Urobilinogen

14

Some urobilinogen goes back into bile and is sent back to the _______, this is changed to _______, which gives brown color to feces

intestine
stercobilin

15

Without bile, what do feces look like?

feces are grey/white with fatty streaks

16

What is pancreatitis?

Inflammation of pancreas

17

What results when various safeguards against self-digestion are insufficient?

Pancreatitis

18

What is caused by reflux of pancreatic juice and bile and chyme from duodenum back into the pancreatic ducts?

Pancreatitis

19

What is cirrhoris?

Large number of liver lobules are destroyed and replaced with permanent C.T.

20

What are the most potent stimulators of gastrin, and acid secretion?

Tryptophan and Phenylalanine

21

People with _____ _____ must avoid foods that strongly stimulate acid secretions
Eg: Milk, cola, beer, coffee, tea, and wine

Peptic ulcers

22

What is gangrene?

Tissue necrosis resulting from an insufficient blood supply