In the digestive tract, absorption is controlled by mechanisms on the cell's apical membrane surface. What type of physical barriers would be in place to keep these mechanisms from being circumnavigated?
A)microvilli
B)desmosomes
C)tight junctions
D)gap junctions
E)carrier proteins

Question

Quizplus · Accepted Answer

Tight junctions are physical barriers that prevent the passage of substances between cells, ensuring that absorption mechanisms on the apical membrane are not bypassed.

In the Digestive Tract, Absorption Is Controlled by Mechanisms on the Cell's