Question

If the cardiac output of a person is $5$ lit. and his breathing rate is $18$ per min. The amount of blood that will be oxygenated in the lungs per minute will be:

• A. $5000ml$
• B. $4900ml$
• C. $70ml$
• D. $9000ml$

Answer 1

The correct option is A $5000ml$

• Cardiac output is the production of the heart rate per minute and the stroke volume that is the amount of the blood that is pumped out by the heart. Which as the question is 5 L that means that the cardiac output of a person per minute is 5 L.
• The breathing rate is 18 per minute that means the persons respires 18 times per minute which also means that 18 times oxygen enters the lungs to oxygenate blood in the lungs.
• Therefore per minute oxygenation that is done in the lungs is the amount of the blood that will enter the lungs per minute which will be 5 L or 5000 mL.
• Therefore the answer A is correct.