21) 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

21)  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

alphadxg · Answer

In this situation, the cells find themselves in a glucose rich environment.  There is not a need to expend energy to take in glucose under these conditions.  Glucose is moving down a concentration gradient. E is answer