Final answer:
The partial pressure of alveolar oxygen can be calculated using the variables c) FiO2 (fraction of inspired oxygen) and barometric pressure.
Step-by-step explanation:
To calculate the partial pressure of alveolar oxygen, you would need the variables c) FiO2 (fraction of inspired oxygen) and barometric pressure.
The fraction of inspired oxygen (FiO2) represents the concentration of oxygen in the air being inhaled, and the barometric pressure refers to the pressure exerted by the atmosphere.
These variables are important as they determine the amount of oxygen available in the alveolar spaces within the lungs. By knowing the FiO2 and the barometric pressure, you can calculate the partial pressure of alveolar oxygen.