Exam 5 (Intestinal Transport of Electrolytes + Water)

Question 1

Term for movement of electrolytes and water between GI tract and ECFV

Answer 1

enterosystemic fluid balance

Question 2

Most of the fluid entering GI tract is from _____ secretions.

Answer 2

endogenous

Question 3

What percent of fluid is recovered by the small and large intestine?

Answer 3

98%

Question 4

Where does fluid that body recovers go? (3)

Answer 4

1. urine output
2. sweat
3. insensible loss (ex. breathing)

Question 5

During a meal, fluid is absorbed how? Between meals fluid is absorbed how?

Answer 5

during: absorbed with nutrients
between: NaCl coupled exchanger

Question 6

Where does absorption occur in small intestine? Large intestine?

Answer 6

SI: villi
LI: surface epithelium

Question 7

Where does secretion of fluid occur in both small and large intestine?

Answer 7

crypt

Question 8

What contains the differentiated cell populations? How does digestion occur here? What 3 things get absorbed here?

Answer 8

villi
digestion by brush border enzymes + absorption of nutrients/electrolytes/water

Question 9

The villi have (differentiated/undifferentiated) cell types while the intestinal crypt have (differentiated/undifferentiated) cell types.

Answer 9

differentiated
undifferentiated

Question 10

What are examples of undifferentiated cell types that occur in the intestinal crypt?

Answer 10

stem cells
transit amplifying cells (progenitor)

Question 11

What occurs in the crypt domain (2 things)?

Answer 11

1. proliferation
2. secretion (electrolyes/water)