Exam 3 Clicker Questions Flashcards
Compounds that dissociate incompletely into hydrogen ions and a conjugate base are members of which of the following compounds?
a) strong acids
b) weak acids
c) strong bases
d) weak bases
b) weak acids
The bicarbonate buffer system consists of a bicarbonate salt and which of the following?
a) weak acid
b) strong acid
c) weak base
d) strong base
a) weak acid
Primary active hydrogen secretion involves a hydrogen-transporting ATPase. It occurs in which of the following parts of the renal tubules?
a) descending limb of Henle
b) ascending limb of Henle
c) late distal tubules in intercalated cells
d) early collecting tubules in principal cells
c) late distal tubules in intercalated cells
Most bicarbonate reabsorption occurs in which of the following parts of the renal tubule?
a) proximal tubule
b) descending limb of Henle
c) ascending limb of Henle
d) distal tubule
a) proximal tubule
Which of the following occurs when a decrease in bicarbonate ion results in a decrease in the ratio of bicarbonate ion to carbon dioxide in the extracellular fluid?
a) respiratory acidosis
b) respiratory alkalosis
c) metabolic acidosis
d) metabolic alkalosis
c) metabolic acidosis
Respiratory alkalosis due to a decrease in carbon dioxide concentration caused by hyperventilation is compensated for by which of the following mechanism?
a) increased ventilation rate
b) decreased ventilation rate
c) renal excretion of bicarbonate ion
d) renal addition of new bicarbonate ion to extracellular fluid
c) renal excretion of bicarbonate ion
Which of the following buffer systems is most important in buffering renal tubular fluid?
a) phosphate buffer system
b) carbonate buffer system
c) bicarbonate buffer system
d) hemoglobin buffer system
a) phosphate buffer system
