PNB 2265 QUIZ ON RESP. (EXAM 3)
QUESTIONS AND ANSWERS
The PO2 of systemic arterial blood is ________ mmHg and the PCO2 of systemic
arterial blood is _______ mmHg.
A. 100; 100
B. 40; 100
C. 100; 40
D. 46; 40
E. 40; 46 - Correct Answers -C. 100; 40
At the beginning of the pulmonary capillaries, the blood PO2 is _______ mmHg and the
PCO2 is _______ mmHg.
A. 46; 40
B. 100; 100
C. 40; 46
D. 100; 40
E. 40; 100 - Correct Answers -C. 40; 46
The PO2 of alveolar air is ________ mm Hg and the PCO2 of alveolar air is ________
mmHg.
A. 100; 100
B. 100; 40
C. 40; 46
D. 46; 40
E. 40; 100 - Correct Answers -B. 100; 40
At the beginning of systemic capillaries, the PO2 is _______ mmHg and the PCO2 is
_______ mmHg.
A. 46; 40
B. 40; 100
C. 100; 100
D. 100; 40
E. 40; 46 - Correct Answers -D. 100; 40
Which of the following is true for blood about to leave the systemic capillaries (i.e., in the
tissues)?
, A. In red blood cells, some CO2 is bound to Hb.
B. In red blood cells, some CO2 is converted to carbonic acid (H2CO3)
C. Cl- ions are leaving the red blood cell.
D. All of the above are true
E. None of the above are true - Correct Answers -D. All of the above are true
How is most CO2 transported in the blood?
A. Dissolved in plasma
B. Bound to the heme portion of Hb
C. Bound to H2CO3 (carbonic acid)
D. As bicarbonate ion in red blood cells
E. As bicarbonate ions in the plasma - Correct Answers -E. As bicarbonate ions in the
plasma
The partial pressure of O2 in the blood is due to the oxygen that is ________ .
A. Bound to Hb
B. Dissolved in the plasma
C. Both of the above
D. Neither of the above - Correct Answers -B. Dissolved in the plasma
In the lungs, HCO3- ions move ___________ red blood cells and Cl- ions move
__________ red blood cells.
A. Into, into
B. Out of, out of
C. Into, out of
D. Out of, into - Correct Answers -C. Into, out of
The enzyme carbonic anhydrase catalyzes the formation of ___________ .
A. Into, into
B. Out of, out of
C. Into, out of
D. Out of, into - Correct Answers -C. Into, out of
PO2 in the atmosphere is ( / / 40) [A] mmHg, and PO2 in a well-
ventilated alveolus is ( / / 40) [B] mmHg. PO2 in blood just ENTERING
pulmonary capillaries is ( / / 40) [C] mmHg, which is (greater than / less
than / the same as) [D] PO2 in the systemic veins. PCO2 in the blood at the END of the
pulmonary capillary bed is ( / 40 / .3) [E] mmHg, which is (greater than / less
than / the same as) [F] PCO2 in the alveolus. - Correct Answers -A. 160
B. 100
C. 40
D. the same as
QUESTIONS AND ANSWERS
The PO2 of systemic arterial blood is ________ mmHg and the PCO2 of systemic
arterial blood is _______ mmHg.
A. 100; 100
B. 40; 100
C. 100; 40
D. 46; 40
E. 40; 46 - Correct Answers -C. 100; 40
At the beginning of the pulmonary capillaries, the blood PO2 is _______ mmHg and the
PCO2 is _______ mmHg.
A. 46; 40
B. 100; 100
C. 40; 46
D. 100; 40
E. 40; 100 - Correct Answers -C. 40; 46
The PO2 of alveolar air is ________ mm Hg and the PCO2 of alveolar air is ________
mmHg.
A. 100; 100
B. 100; 40
C. 40; 46
D. 46; 40
E. 40; 100 - Correct Answers -B. 100; 40
At the beginning of systemic capillaries, the PO2 is _______ mmHg and the PCO2 is
_______ mmHg.
A. 46; 40
B. 40; 100
C. 100; 100
D. 100; 40
E. 40; 46 - Correct Answers -D. 100; 40
Which of the following is true for blood about to leave the systemic capillaries (i.e., in the
tissues)?
, A. In red blood cells, some CO2 is bound to Hb.
B. In red blood cells, some CO2 is converted to carbonic acid (H2CO3)
C. Cl- ions are leaving the red blood cell.
D. All of the above are true
E. None of the above are true - Correct Answers -D. All of the above are true
How is most CO2 transported in the blood?
A. Dissolved in plasma
B. Bound to the heme portion of Hb
C. Bound to H2CO3 (carbonic acid)
D. As bicarbonate ion in red blood cells
E. As bicarbonate ions in the plasma - Correct Answers -E. As bicarbonate ions in the
plasma
The partial pressure of O2 in the blood is due to the oxygen that is ________ .
A. Bound to Hb
B. Dissolved in the plasma
C. Both of the above
D. Neither of the above - Correct Answers -B. Dissolved in the plasma
In the lungs, HCO3- ions move ___________ red blood cells and Cl- ions move
__________ red blood cells.
A. Into, into
B. Out of, out of
C. Into, out of
D. Out of, into - Correct Answers -C. Into, out of
The enzyme carbonic anhydrase catalyzes the formation of ___________ .
A. Into, into
B. Out of, out of
C. Into, out of
D. Out of, into - Correct Answers -C. Into, out of
PO2 in the atmosphere is ( / / 40) [A] mmHg, and PO2 in a well-
ventilated alveolus is ( / / 40) [B] mmHg. PO2 in blood just ENTERING
pulmonary capillaries is ( / / 40) [C] mmHg, which is (greater than / less
than / the same as) [D] PO2 in the systemic veins. PCO2 in the blood at the END of the
pulmonary capillary bed is ( / 40 / .3) [E] mmHg, which is (greater than / less
than / the same as) [F] PCO2 in the alveolus. - Correct Answers -A. 160
B. 100
C. 40
D. the same as
