Which of the following is correct Question 8 options The par

Which of the following is correct?

Question 8 options:

The partial pressure of oxygen in systemic venous blood is normally 40 mm Hg.

The partial pressure of carbon dioxide in systemic venous blood is normally 40 mm Hg.

The partial pressure of oxygen is normally lower in the alveoli than in systemic arterial blood.

The partial pressure of carbon dioxide is normally higher in the alveoli than in systemic arterial blood.

The partial pressures of carbon dioxide in the alveoli and pulmonary arterial blood are the same.

Solution

options A, B and E are correct. In systemic venous blood the oxygen tension is in between 30 mmHg and 40 mmHg and is same for corban dioxide.

Partial pressure of oxygen in (mmHg)

Partial pressure of carbon dioxide in (mmHg)

There is no such difference in alveolar and arteriole blood.