Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells?
A) simple diffusion
B) phagocytosis
C) active transport pumps
D) exocytosis
E) facilitated diffusion

Question

Quizplus · Accepted Answer

Facilitated diffusion is the most probable mechanism because it allows for the rapid movement of glucose across cell membranes through specific transport proteins, bypassing the slow diffusion through the phospholipid bilayer.

Glucose Diffuses Slowly Through Artificial Phospholipid Bilayers