What is the cardiac output when O2 consumption = 180 mL/min, ...

[washai]

What is the cardiac output when O2 consumption = 180 mL/min, arterial O2 content = 18.4 vol, and mixed venous O2 content = 14.4 vol.
 
  a. 4.5 mL/min c. 6.5 mL/min
  b. 5.5 mL/min d. 7.5 mL/min

Question 2

What is the cardiac output when oxygen (O2) consumption = 200 mL/min, arterial O2 content = 21 vol, and mixed venous O2 content = 15 vol?
 
  a. 3.3 mL/min c. 5.3 mL/min
  b. 4.3 mL/min d. 6.3 mL/min

[EAN94]

Answer to Question 1

ANS: A
Cardiac output = oxygen consumption  (arterial O2 content  mixed venous O2 content). 18.4 vol = 18.4 mL/100 mL and 14.4 vol = 14.4 mL/100 mL. Therefore, 180 mL/min  (18.4 mL/100 mL  14.4 mL/100 mL) 10 = 4.5 mL/min.

Answer to Question 2

ANS: A
Cardiac output = oxygen consumption  (arterial O2 content  mixed venous O2 content). 21 vol = 21 mL/100 mL and 15 vol = 15 mL/100 mL. Therefore, 200 mL/min  (21 mL/100 mL  15 mL/100 mL) 10 = 3.3 mL/min.