which of the following is false about glucose reabsorption in the renal tubule?
ID: 3520036 • Letter: W
Question
which of the following is false about glucose reabsorption in the renal tubule?
a. Glucose moves out of the tubular cells by facilitated diffusion.
b. the movement of glucose across the luminal membrane is accomplished by a co-transport carrier which relies on phosphorylation, in order to increase its affinity for glucose.
c. by using secondary active transport, rather than facilitated diffusion, more glucose is absorbed from the filtrate.
d. the sodium-potassium pump must be functioning for glucose reabsorption to occur.
e. glucose reabsorption is linked to the reabsorption of sodium into the peritubular capillaries.
Explanation / Answer
The option ( a) Glucose moves out of tubular cells by facilitated diffusion is false.
Reabsorption of glucose only occurs in proximal tubule regardless of concentration gradient using secondary active transport. The co- transportar used is sodium ( sodium-potassium pump).
Facilitated diffusion needs concentration gradient and can occur between blood and cells without utilising ATPs.
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