What is the most common transport mechanism by which glucose and other organic solutes cross the luminal membrane of an epithelial cell layer?
A)Secondary active cotransport with Na⁺
B)Glucose ATPase pump
C)Facilitated diffusion
D)Simple diffusion through the paracellular pathway
E)Through an ion channel

Question

What is the most common transport mechanism by which glucose and other organic solutes cross the luminal membrane of an epithelial cell layer?
A)Secondary active cotransport with Na⁺
B)Glucose ATPase pump
C)Facilitated diffusion
D)Simple diffusion through the paracellular pathway
E)Through an ion channel

Quizplus · Accepted Answer

Secondary active cotransport with Na⁺ is the most common mechanism for glucose and other organic solutes to cross the luminal membrane of an epithelial cell layer. Na⁺ is actively transported out of the cell into the interstitial fluid, creating a gradient that drives the transport of glucose and other solutes from the lumen into the cell.

What Is the Most Common Transport Mechanism by Which Glucose and Other