Question

Place the following in order from highest to lowest expected partial pressure oxygen levels.

• Cells of systemic tissues
• Atmospheric air
• Systemic capillaries
• Pulmonary capillaries
• Alveoli of lungs

Answer 1

The expected partial pressure oxygen levels in order from highest to lowest are: Alveoli of lungs, Pulmonary capillaries, Systemic capillaries, Cells of systemic tissues, Atmospheric air.

Step-by-step explanation:

In terms of expected partial pressure oxygen levels, the order from highest to lowest would be:

1. Alveoli of lungs - Partial pressure of oxygen in the alveoli is about 104 mm Hg.
2. Pulmonary capillaries - Partial pressure of oxygen in the blood of the capillary is about 40 mm Hg.
3. Systemic capillaries - Partial pressure of oxygen in the systemic tissues is about 40 mm Hg.
4. Cells of systemic tissues - Partial pressure of oxygen in the tissue cells is about 40 mm Hg.
5. Atmospheric air - Partial pressure of oxygen in the atmospheric air is about 21% (not given in mm Hg).

Answer 2

Atmospheric air

Alveoli of lungs

Pulmonary capillaries

Systemic capillaries

Cells of systemic tissues

Step-by-step explanation:

Partial pressure of oxygen levels in the blood is very important for the oxygen diffusion.Partial pressure of oxygen is defined as the amount of pressure exerted by oxygen in the blood. If two adjacent areas have a different partial pressure of the oxygen, the oxygen will move from the area of higher concentration to the area of lower concentration until it reaches equilibrium. So this is a principle by which oxygen is picked up from the atmospheric air, transported through the capillaries and other vessels and delivered to the cells of systemic tissues.