The law of partial pressure, also known as Dalton's law, states that the individual gases in the air contribute to the total atmospheric pressure as a function of the percentage each gas contributes to the total volume.
If two gases have the same partial pressure, but gas A has a higher water solubility coefficient than gas B, then gas A will diffuse at a faster rate.
Henry's law states that the amount of a gas that dissolves in water is a function of its partial pressure and its solubility coefficient.
If the alveolar partial pressure of gas A is 110 mm Hg and the partial pressure of gas B is 135, then gas B will diffuse into the blood at a faster rate.
If the P(CO2) in the tissues increases, then the P(CO2) in the systemic venous blood will increase.