10 Questions
What is the primary mechanism by which ventilation occurs?
Convection of gases between the external environment and the alveoli
What is the relationship between atmospheric pressure and pulmonary ventilation?
Pulmonary ventilation is directly proportional to atmospheric pressure.
Which of the following is a characteristic of normal ventilatory patterns?
Constant and consistent breathing rate
What is the primary role of a respiratory therapist in understanding pulmonary ventilation?
To develop a comprehensive understanding of the mechanisms of pulmonary ventilation
What is the primary purpose of a mercury barometer?
To measure the atmospheric (barometric) pressure
What does a positive pressure of +5 mmHg in the alveoli indicate?
The pressure in the alveoli is 5 mmHg higher than atmospheric pressure.
What does a pressure of -4 mmHg in the trachea indicate?
The pressure in the trachea is 4 mmHg lower than atmospheric pressure.
What is the primary principle of pulmonary ventilation?
Gas always moves down its pressure gradient from high pressure to low pressure.
What is the pressure in the trachea when it is described as having a pressure of 0 mmHg?
The pressure in the trachea is equal to atmospheric pressure of 760 mmHg.
During which phase of the respiratory cycle does the alveolar pressure become higher than the barometric pressure?
During expiration.
This quiz covers the process of moving gases between the external environment and alveoli, as well as the mechanisms of pulmonary ventilation and elastic properties of the lungs that respiratory therapists must understand. ©2013 Delmar Cengage Learning. All Rights Reserved.
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