Download Exam 3

2.
What catalyst is needed to form carbonic acid from water and CO 2?
A. trypsin
B. carbonic anhydrase
C. bicarbonate base
D. HCl
E. gastrin
*
3.
Which of the following is a major buffer of H + in the renal tubule?
A. protein
B. HCO3C. water
D. carbonic acid
* E. phosphate
4.
Which of the following helps to compensate for depletion of bicarbonate stores due to respiratory
loss of CO2?
A. lungs
* B. kidneys
C. HCO3D. protein
E. phosphate
5.
Which of the following is a response by the kidney to systemic acidosis?
A. metabolizing of glutamine to ammonium and HCO3B. increased HCO3- secretion
C. increased H+ reabsorption
D. increased reabsorption of phosphate
E. increased filtering of HCO3-
*
6.
*
In a healthy individual with normal acid-base balance, how much of the filtered bicarbonate is
reabsorbed?
A. >99%
B. 75%
C. 50%
D. 25%
E. None. The kidney makes all new bicarbonate by breaking down glutamine.
Which of the following is accomplished by the secretion of H + by the nephron?
A. increased HCO3- secretion
* B. increased net excretion of H+
C. increased urine pH
D. increased HCO3- formation by glutamine
E. decreased phosphate buffering in the nephron
7.
8.
*
In an individual with alkalosis, which of the following would you hope to see in the urine?
A. increased H+
B. decreased pH
C. increased HCO3D. increased buffering of H+ by ammonia
E. increased buffering of H+ by phosphate