What is the role of tight junctions in the transport of glucose across the intestinal epithelium?
a. They open and allow glucose to pass between the epithelial cells.
b. They keep the Na+-K+ pumps in the apical membrane only.
c. They keep the Na+-glucose cotransporter in the apical membrane and the glucose-facilitated transporter in the basolateral membrane.
d. They keep the glucose-facilitated transporter in the apical membrane and the Na+-glucose cotransporter in the basolateral membrane.
Ans: c. They keep the Na+-glucose cotransporter in the apical membrane and the glucose-facilitated transporter in the basolateral membrane.
You might also like to view...
In which of the following places would you
find the largest concentrations of normal flora?
a. armpits b. between the toes c. mouth d. stomach fluids e. hair
During contraction,
a. cross-bridges of muscle filaments are broken and reformed. b. ATP is used to break cross-bridges. c. muscle cells use glucose derived from glycogen as an energy source. d. glycogen depletion may lead to muscle fatigue. e. all of these occur.
Cancer cells secrete an activator of the enzyme ________ to degrade basal lamina and extracellular matrix and activate matrix metalloproteinases
Fill in the blank with correct word.
What are the conserved and variable regions of group I introns in Tetrahymena?
What will be an ideal response?