Question

Na+ crosses the luminal side of the small intestine epithelium using (select all that apply): a....

Na+ crosses the luminal side of the small intestine epithelium using (select all that apply):

a. follows water

b. Na+-glucose cotransport

c. Na+-amino acid cotransport

d. Na+ channels

Science   Anatomy-And-Physiology   
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Answer #1

Answer:

b. Na+-glucose cotransport

c. Na+-amino acid cotransport

d. Na+ channels

Explanation: Na+ - Glucose cotransport and Na+ Glucose Cotransport are the secondary active transport operating at luminal side of intestinal epithelium that allows absorption of Na+ along its concentration gradient with Glucose or Amino acid transport actively against their concentration gradient.

Sodium channels are also present that passively transport sodium channels.

Also the sodium Hydrogen exchange occurs at luminal side

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