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Introduction to Ventilation and Respiratory Therapy

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Introduction to Ventilation and Respiratory Therapy

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Questions and Answers

What is the primary mechanism by which ventilation occurs?

Osmosis of gases between the external environment and the alveoli

Diffusion of gases between the external environment and the alveoli

Active transport of gases between the external environment and the alveoli

Convection of gases between the external environment and the alveoli (correct)

What is the relationship between atmospheric pressure and pulmonary ventilation?

Pulmonary ventilation is inversely proportional to atmospheric pressure.

Atmospheric pressure has no influence on pulmonary ventilation.

Pulmonary ventilation is affected by atmospheric pressure, but the relationship is complex and non-linear.

Pulmonary ventilation is directly proportional to atmospheric pressure. (correct)

Which of the following is a characteristic of normal ventilatory patterns?

Constant and consistent breathing rate (correct)

Shallow and rapid breathing

Irregular and unpredictable breathing rate

Breathing that is completely independent of the body's oxygen and carbon dioxide levels

What is the primary role of a respiratory therapist in understanding pulmonary ventilation?

To develop a comprehensive understanding of the mechanisms of pulmonary ventilation Signup and view all the answers

What is the primary purpose of a mercury barometer?

To measure the atmospheric (barometric) pressure Signup and view all the answers

What does a positive pressure of +5 mmHg in the alveoli indicate?

The pressure in the alveoli is 5 mmHg higher than atmospheric pressure. Signup and view all the answers

What does a pressure of -4 mmHg in the trachea indicate?

The pressure in the trachea is 4 mmHg lower than atmospheric pressure. Signup and view all the answers

What is the primary principle of pulmonary ventilation?

Gas always moves down its pressure gradient from high pressure to low pressure. Signup and view all the answers

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. Signup and view all the answers

During which phase of the respiratory cycle does the alveolar pressure become higher than the barometric pressure?

During expiration. Signup and view all the answers