Why are tight junctions sealing the passage between cells important in co-transp
ID: 3473842 • Letter: W
Question
Why are tight junctions sealing the passage between cells important in co-transport mechanisms?
Gradients produced by the sodium potassium ATPase pumps would be abolished
These juntions allow cell to cell communication needed for normal operation of Na+/K+ ATPase pumps
Molecules that move into this region would increase glucose concentrations
They are similar to gap junctions permitting molecular diffusion
They are located near the top of cells allowing diffusion of molecules that maintain gradients
A.Gradients produced by the sodium potassium ATPase pumps would be abolished
B.These juntions allow cell to cell communication needed for normal operation of Na+/K+ ATPase pumps
C.Molecules that move into this region would increase glucose concentrations
D.They are similar to gap junctions permitting molecular diffusion
E.They are located near the top of cells allowing diffusion of molecules that maintain gradients
Explanation / Answer
Tight junctions are formed between two adjacent cells whose cell membrane join together to form a barrier which is virtually impermeable to fluids. Na/K ATPase activities are required for the formation of tight junctions. Therefore, tight junctions allow cell to cell communication needed for normal operation of Na+/K+ ATPase pumps. So, the correct answer for this question is option B.
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