Which of the following is NOT a buffer system of the body?
A. bicarbonate buffer system
B. phosphate buffer system
C. protein buffer system
D. NaCl buffer system
E. hemoglobin buffer
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Question 2) Body fluid pH will rise dramatically when
A. sodium is excreted by the kidney.
B. large amounts of bicarbonate are ingested.
C. carbonic acid is formed.
D. the respiratory rate decreases.
E. carbon dioxide levels increase.
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Question 3) As a result of hyperventilation,
A. the body pH decreases.
B. the plasma PCO2 level decreases.
C. the kidney will increase the rate of hydrogen ion excretion.
D. more bicarbonate ions are added to the plasma.
E. the plasma PCO2 level increases.
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Question 4) An increase in blood CO2 levels is followed by a(n) ____ in H+ ions and a(n) ____ in blood pH.
A. decrease, decrease
B. decrease, increase
C. increase, increase
D. increase, decrease
E. increase, no change
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Question 5) Which of the following substances releases hydrogen ions into a solution?
A. acids
B. bases
C. salts
D. glucose
E. water
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Question 6) Chemicals that function to minimize changes in the pH of body fluids are called
A. buffers.
B. inhibitors.
C. accelerators.
D. activators.
E. stabilizers.
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Question 7) If the hydrogen ion concentration in the blood increases, bicarbonate ions act as buffers by
A. removing excess hydrogen ions from the plasma.
B. releasing hydrogen ions into the plasma.
C. dissociating into H+ and CO3-.
D. combining with chloride ions.
E. combining with hemoglobin.
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Question 8) pH
A. increases with acidity.
B. is measured on a scale of 0 to 10.
C. is a measure of the hydrogen ion concentration.
D. reflects sodium content of body fluids.
E. is not related to amounts of carbon dioxide in the body.
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Question 9) A person working in the hot sun loses the greatest amount of water from the
A. lungs.
B. urine.
C. mouth.
D. skin.
E. GI tract.
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Question 10) Angiotensin II increases blood volume by stimulating
A. thirst.
B. vasodilatation.
C. water movement into the cells.
D. renal excretion of sodium.
E. ADH production.
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