Which of the following statements concerning HCO3- excretion by the kidneys is incorrect?
a. During HCO3- reabsorption, HCO3- in the tubular fluid is actively cotransported by K+.
b. HCO3- is not excreted at pH =7.4.
c. Secretion of H+ is accompanied by the addition of new HCO3- to the plasma.
d. HCO3- excretion increases during alkalosis.
e. None of the above are incorrect.
A
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