Mechanisms for absorption Flashcards
1
Q
How do amino acids and monosaccharides enter an epithelial cell?
A
They enter via co-transport proteins that only function when sodium ions are present.
2
Q
How is the sodium ion gradient between the lumen and epithelial cell maintained?
A
maintained by the sodium-potassium pump.
3
Q
How do amino acids and monosaccharides move from epithelial cells into capillaries?
A
facilitated diffusion
4
Q
How does glycerol and fatty acids enter epithelial cells?
A
By diffusion
5
Q
What happens to monoglycerides and fatty acids in epithelial cells?
A
In epithelial cells, the endoplasmic reticulum turns them into triglycerides.
Then, the Golgi apparatus packages them into lipoproteins.
6
Q
A
