Intro to Pulmonary A/P Physics of Breathing

Question 1

mechanics of breathing

Answer 1

movement of air (air flow) is dictated by presure gradients and resistance

Question 2

physical properties of the lungs

Answer 2

compliance
elasticity
surface tension
resistance to airflow

Question 3

compliance of lungs

Answer 3

distansibility of the lung

Question 4

compliance of longs example

Answer 4

broken rib = less compliance

Question 5

elasticity of lungs

Answer 5

ability of the lung to return to its initial size after being distended

Question 6

elasticity of lungs example

Answer 6

fibrosis = decreases elasticity

Question 7

surface tension of lungs

Answer 7

air-liquid interface at the alveolar level which causes collapse of alveoli

Question 8

surface tension of lungs example

Answer 8

suractant is a molecule produced by the lungs which decreases surface tension

Question 9

resistance to airflow of the lungs

Answer 9

pressure difference assisting in ventilation

Question 10

respiration

Answer 10

gas exchange in the lungs

Question 11

diffusion depends on —

Answer 11

ventilation, perfusion, matching

Question 12

normal diffusion

Answer 12

equal perfusion and ventilation

Question 13

shunting

Answer 13

greater amounts of perfusion and less ventilation

Question 14

dead space ventilation

Answer 14

greater amounts of ventilation but no perfusion