4/3 Lecture

Question 1

How much air should be in the lungs at FRC?

Answer 1

3L

Question 2

What is the CO₂ tension of the lungs at FRC?

Answer 2

40 mmHg

Question 3

What is the O₂ tension of the lungs at FRC?

Answer 3

100 mmHg

Question 4

What is the systemic arterial O₂ tension of the blood at FRC?

What about systemic venous O₂ tension at FRC?

Answer 4

Sys Art O₂ = 100 mmHg

Sys Ven O₂ = 40 mmHg

Question 5

What is the systemic arterial CO₂ tension of the blood at FRC?

What about systemic venous CO₂ tension at FRC?

Answer 5

Sys Art CO₂ = 40 mmHg
Sys Ven CO₂ = 45 mmHg

Question 6

What is the pulmonary arterial O₂ tension of the blood at FRC?

What about pulmonary venous O₂ tension at FRC?

Answer 6

Pulm Art O₂ = 40 mmHg

Pulm Ven O₂ = 100 mmHg

Question 7

What is the pulmonary arterial CO₂ tension of the blood at FRC?

What about pulmonary venous CO₂ tension at FRC?

Answer 7

Pulm Art CO₂ = 45 mmHg
Pulm Ven CO₂ = 40 mmHg

Question 8

O₂ concentration ________ the deep it goes into the respiratory system eventually the O₂ concentration to ________

Answer 8

decreases; 13.15%

Question 9

How many mLs of O₂ are present in the lungs at FRC, in-between breaths?

Answer 9

395 mL of O₂

Question 10

How much O₂ is consumed per minute on average?

Answer 10

250 mL of O₂ / min

Question 11

Under what conditions can the volume for RV drop below 1L?

Answer 11

When a patient is paralyzed