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Surfactant is made by ____________, and the greater the surface density of surfactant molecules at the air-water interface, the __________ the surface tension.

Other things being equal, reducing alveolar ventilation by half will cause:

The accompanying Figure 5 is an O2-CO2 diagram for a normal individual. Which point most closely corresponds to the composition of inspired air?    

The Henderson-Hasselbalch equation:

An example in which the limbic system has dominant control over ventilation is:

When a healthy person is resting at sea level, at what point does oxygen normally reach diffusion equilibrium across the alveolar blood-gas barrier?

Regional respiratory alkalosis in the lung causes bronchioles to:

A subject is in a steady state, with a cardiac output (Q˙) of 5 liters/min. The arterial O2 content is 20 ml O2(STP)/100 ml of blood. The mixed-venous O2 content is 14 ml O2 (STP)/100 ml of blood. What is the subject’s rate of O2 consumption (V.O2 ) ?

Which of the following practices is most likely to put a person at risk of chromium deficiency? 

A college student is underweight and would like to gain weight. She is surprised when the dietitian tells her to: