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Acid/Base Balance Quiz
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1. The only way the body can get rid of the huge acid load produced by metabolic reactions is to
a. increase the concentration of bicarbonate ions
b. breathe faster and more deeply
c. excrete hydrogen ions in the urine
d. increase the concentration of proteins in the plasma
2. The falling blood pH and a rising partial pressure of CO2 due to pneumonia or emphysema
indicates
a. respiratory acidosis
b. respiratory alkalosis
c. metabolic acidosis
d. metabolic alkalosis
3. Hydrogen ions are normally eliminated from the body
a. by excretion in urine
b. via insensible perspiration
c. in expired air
d. via liver detoxification
4. Which of the following would serve to buffer H+?
a. any strong acid
b. any weak acid
c. HCO3+
d. NaH2PO4
5. A blood pH of 7.1 is said to be:
a. neutral
b. alkaline
c. acidic
d. homeostatic
6. As ventilation increases and more carbon dioxide is removed from the blood,
a. pCO2 will increase
b. hydrogen ion concentration of the blood will decrease
c. blood pH will decrease
d. hydrogen ion concentration of the blood will decrease
www.durhamcollege.ca/sals
905.721.2000 ext. 2491
Student Services Building (SSB), Room 204
This document last updated: 7/29/2011
Student Academic Learning Services
Page 2 of 3
7. If the pH of blood plasma becomes 7.49 due to ingested substances, ALL of the following would
happen to compensate EXCEPT
a. respiration rate decreases
b. the kidney increases secretion of bicarbonate tubule ions
c. cells produce more ammonia from glutamate
d. the partial pressure of carbon dioxide in blood would begin to rise
8. To compensate for metabolic acidosis, the body will
a. excrete more bicarbonate ions
b. increase respiration rate
c. decrease respiration rate
d. excrete more monohydrogen phosphate ions
9. In a patient with severely compromised lung function, which is most likely to stimulate the
respiratory center in the medulla?
a. low PaCO2
b. high PaCO2
c. low PaCO2
d. high PaO2
10. The maintenance of the proper pH of the body fluids may be the result of
a. the control of respiratory ventilation
b. the operation of the various buffer systems in the stomach
c. the active secretion of OH- into the filtrate by the kidney tubule cells
d. control of acids produced in the stomach
11. Receptors that detect changes in PaCO2 are called:
a. chemoreceptors
b. nocireceptors
c. pH receptors
d. osmoreceptors
12. Hyperventilation (breathing in and out more air than normal) during a panic attack causes an
increase in blood ______.
a. partial pressure of CO2 and H+
b. pH
c. H+
d. partial pressure of CO2
www.durhamcollege.ca/sals
905.721.2000 ext. 2491
Student Services Building (SSB), Room 204
This document last updated: 7/29/2011
Student Academic Learning Services
Page 3 of 3
Answers
1. c
2. a
3. a
4. c
5. c
6. b
7. c
8. b
9. c
10. a
11. a
12. b
www.durhamcollege.ca/sals
905.721.2000 ext. 2491
Student Services Building (SSB), Room 204
This document last updated: 7/29/2011