Pulmonary Circulation — Flashcards

Flashcard 1: In zone _____ of the lung, blood flow (Q) is highest

Answer: 3 (base)

Flashcard 2: The _____ of a respiratory system pressure-volume curve represents lung compliance

Answer: slope

Flashcard 3: In zone 2 of the lung, blood flow is driven by the difference between _____ and alveolar pressure

Answer: arteriolar

Flashcard 4: The two sources of the physiologic shunt are _____ blood flow and a small portion of coronary venous blood (drains into the left ventricle via the thebesian vein)

Answer: bronchial

Flashcard 5: Water fall effect has been used to describe the blood flow in the _____ portion of lung.

Answer: middle

Flashcard 6: The graph given below shows _____ _____thoracic obstruction

Answer: variable

Flashcard 7: The graph given depicts the _____ effect

Answer: Haldane

Flashcard 8: 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 9: According to Fick's law, the rate of diffusion of a gas (Vgas) is equal to: _____

Answer:

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

Answer: Bohr equation