Question

Renal tubules normally reabsorb 

A. More water every hour than the entire plasma volume. 

B. All filtered HCO₃^-  in respiratory acidosis. 

C. All filtered amino acids. 

D. All filtered plasma proteins. 

E. More K⁺ than Cl^-.

Answer 1

A. True About 99 per cent of the glomerular filtrate (about 8 litres/hour). 

B. True This plus HCO₃^-  manufactured in the kidney compensates the respiratory acidosis. 

C. True These are filtered but do not appear in normal urine. 

D. True Again some are filtered but do not appear in urine. 

E. False About 20 times as much chloride as potassium is filtered (this is the ratio of their plasma concentrations).