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If the null hypothesis is retained, it is common practice to stop the interpretation of the analysis at this point and conclude that the treatments or conditions have no effect on the DVs.
Diffusion
The passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.
Alveolus
An air sac of the lung through which gas exchange with the blood takes place. Saclike unit of some glands (e.g., mammary glands). One of several flattened vesicles located just inside the plasma membrane in alveolate protists.
Partial Pressure
The pressure exerted by a singular type of gas in a mixture of gases.
Pulmonary Surfactant
A complex mixture of lipids and proteins secreted by cells in the lungs that reduces surface tension, preventing the collapse of alveoli during exhalation.