GI absorption

Question 1

paracellular transport

Answer 1

passage of ions through the tight junctions and lateral cellilar spaces

Question 2

Transcellular transport

Answer 2

transport through the cells

Question 3

how many liters of water contained in GI secretions

Answer 3

7 L

Question 4

how much water is lost in the feces

Answer 4

100 ml

Question 5

Where is most of the water absorbed in the GI tract

Answer 5

jejunum

Question 6

where is sodium absorbed

Answer 6

along the entire length of the intestine but is highest in the jejunum

Question 7

Chloride is absorbed in large amounts in the _____

Answer 7

jejunum

Question 8

Hypo____ can occur with diarrhea

Answer 8

Hypokalemia

Question 9

Calcium absorption is stimulated by _____

Answer 9

Vitamin D (and parathyroid hormone to a lesser extent)

Question 10

Bicarbonate absorption is complete by the end of the ____

Answer 10

Jejunum

Question 11

Potassium can be absorbed OR secreted in the ____

Answer 11

colon

Question 12

Calcium enters enteroctyes through _____ in the ______

Answer 12

ion channels (TRPV) in the brush border membrane

Question 13

Calbindin

Answer 13

binds 2 calcium ions and appears to be essential for calcium absortion

Question 14

Vitamin D induces the sytnthesis of ____ and ____ and increases ____ on the basolatearl membrane

Answer 14

TRPV
Calbindin
Ca 2+ ATPase

Question 15

In general parasympathetics ____ motility and ____ sphincters

Answer 15

Increase

Relax

Question 16

In general sympatetics ___ motility and ____ secretion through ____

Answer 16

decrease
decrease
vasoconstriction