Pulmonary Physiology Topics

Question 1

At rest the Pa is equal to ___

Answer 1

Pb (atm)

Question 2

During inhalation the pressure drops in the alveoli causing ___ to be greater than Pa. This allows air to rush in.

Answer 2

Pb

Question 3

Obstructive Lung Disease does what to work?

Answer 3

Restrictive Forces Change

Question 4

Define the Resistance equation

Answer 4

R= 8nl/r^4

Question 5

___ is the pressure between the visceral and parietal pleura.

Answer 5

Intrapleural Pressure

Question 6

At the end of inhalation the intrapleural pressure is

Answer 6

-8

Question 8

What is the normal PiO2

Answer 8

150mmHg

Question 9

Define FiO2

Answer 9

Percentage of O2 participating in gas exchange

Question 10

What Does AEC of the Pressure Volume Loop measure?

Answer 10

Lung Complianace

Question 11

Increase of air flow resistance does what to respiratory rate?

Answer 11

Decreases RR

Question 12

What does an increase in eleastic resistance do to respiratory rate?

Answer 12

Increases Respiratory Rate

Question 13

What does the Loop Represent?

Answer 13

Work to overcome of non elastic forces (resistive forces)

Question 14

How do you calculate the minute ventilation

Answer 14

Ve = Vt X f

Question 15

Restictive Lung Disease changes what kind of work? (

Answer 15

Changes Elastic Work

Question 16

At rest the intrapleural pressure is

Answer 16

-5

Question 17

Define PiO2

Answer 17

Partial Pressure of inspired O2

Question 18

Define Interdependence

Answer 18

Alveoli hold each other together

Question 19

What is the function of B2 Adrenergic Receptors

Answer 19

Bronchodilator Increase the radius which decreases the Resistance

Question 20

What Does 0AECD0 measure ?

Answer 20

Work of Breathing due to elastic forces

Question 21

How do you calculate Minute Alveolar Ventilation

Answer 21

V.AVL = Vavl * f

Question 22

Describe how an decrease in alveoli could lead to Lung Collapse.

Answer 22

Decreased Alveoli –> Decreased Forces countering elastic recoil –> Collapse –> Increased air resistance

Question 23

what is the normal FiO2

Answer 23

21%

Question 24

Define Transpulmonary Pressure

Answer 24

Pressure across lung tissue that opposes inward elastic recoil

Question 25

If TPP is ever zero what will happen?

Answer 25

Lungs will collapse