6. Which of the following best represents Boyle's law, and how it is relevant to the respiratory system? D
The temperature of the air in the lungs directly affects the rate of ventilation.
Incorrect.
The volume in the thoracic cavity is directly proportional to its temperature.
Incorrect.
The pressure in the thoracic cavity is directly proportional to its volume.
Incorrect.
The pressure in the thoracic cavity is inversely proportional to its volume.  
Correct!



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