Flashcards in Digestion and Absorption- Karius (In Class) Deck (17)
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0
Under normal conditions the colon has to reabsorb about how much?
500mL
1
where does the fluid in the lumen become hypotonic?
in the small intestine
2
how many carbs does the average american consumer per day?
300g
3
how much protein is added to lumen by secretions?
40g/day
4
lipids account for about how many grams ingested?
75g/day
5
paracellular pathway?
between cells
6
transcellular pathway?
thru cells; thru pores (more in duodenum than distally); distally-transporters
7
secondary active transport helps to transport what?
glucose, amino acids, some H2O-soluble vitamins
8
where does secondary active transport take place?
small intestine, NOT LARGE
9
what co-transporter is present in the ileum thru the large intestine?
sodium and cholride
10
major way of absorbing Cl in the early small intestine?
Bicarb/Cl exchanger
11
majority of K is absorbed via what pathway?
paracellular pathway in small intestine
12
what happens with potassium in the large intestine?
it is mainly passively secreted (K high inside cell)
13
what determines the amount of TRPV on membrane of enterocyte? what does it transport?
vitamin D; calcium
14
what keeps calcium out of trouble?
calbindin
15
how is fructose absorbed?
facilitated diffusion
16
