V/Q mismatch — Flashcards

_____ is perfusion of lung regions that are not ventilated (V/Q = 0)

The V/Q ratio at the base of the lung is normally _____, indicating wasted perfusion

In zone _____ of the lung, high alveolar pressure may compress the capillaries and reduce blood flow in this zone

In the lungs, hypoxia causes vaso-_____

Certain organisms that thrive in high O2 (e.g. TB) flourish in the _____ of the lung

Is the A - a gradient normal, increased, or decreased, in response to V/Q mismatch? _____

With exercise (increased cardiac output), there is vasodilation of apical capillaries in the lung, which causes the V/Q ratio to approach a value of _____

In zone 1 (apex) of the lung, blood flow (Q) is _____

If there is a(n) _____ obstruction, the V/Q ratio = ∞ (dead space)*

The partial pressure of O2 in arteriolar blood is slightly _____ than alveolar air due to the "physiologic shunt"