Pulmonary Ventilation — Flashcards

Flashcard 1: _____ law states that, at a given temperature, the product of pressure times volume for a gas is constant.

Answer: Boyle s

Flashcard 2: Pathologic dead space is when part of the respiratory zone is _____, but not perfused (perfused, ventilated)

Answer: ventilated

Flashcard 3: Ventilation of sinuses takes place during _____

Answer: expiration

Flashcard 4: The V/Q ratio at the apex of the lung is normally _____, indicating wasted ventilation

Answer: 3

Flashcard 5: The pulmonary circulation is normally characterized as a _____ resistance, high compliance system (low or high)

Answer: low

Flashcard 6: _____ is the lung volume above Residual Volume at which airways in the lower, dependent parts of the lungs begin to close off because of the lesser transmural pressure in these areas.

Answer: Closing Volume

Flashcard 7: The graph given below shows _____ _____thoracic obstruction

Answer: variable

Flashcard 8: The graph given depicts the _____ effect

Answer: Haldane

Flashcard 9: The alveolar gas equation states that the alveolar PO2 (PAO2) equals:

Answer: PAO2 = PIO2 – (PaCO2 / R) (PIO2 = FiO2 × [Patm – PH2O])

Extra: Where: - PAO2 = Alveolar PO2 - PIO2 = Inspired PO2 - PaCO2 = Arterial PCO2 - R = Respiratory Quotient (typically 0.8) At sea level: - Patm = 760 mmHg - PH2O = 47 mmHg

Flashcard 10: The _____ is used to determine physiologic dead space ($V_D$).

Answer: Bohr equation