Lecture 12 - Variation V/Q

Question 1

Ventilation is enhance in regions of?

Answer 1

high lung compliance, low resistance to air flow

Question 2

Effect of gravity?

Answer 2

For any given blood flow (perfusion) and change in pressure, ventilation is greater at base of lung - except at low lung volumes

Question 3

Blood flow diminish?

Answer 3

when external pressure exceeds fluid pressure

Question 4

V/Q ratio derives fom?

Answer 4

blood flow decreasing at faster rate from bottom to top than ventilation

Question 5

Consequences of Hypoxic Pulmonary Vasoconstriction?

Answer 5

increased pulmonary arterial resistance & therefore pressure leading to increased pressure-volume work by right heart