Lecture 21

Question 1

What is the partial pressure of oxygen and carbon dioxide at sea level?

Answer 1

Oxygen: 21.2kPa or 160mmHg

Carbon Dioxide: 4.04kPa or 30.4mmHg

Question 2

What is the equation for respiratory quotient?

Answer 2

RQ=volume of CO2 produced/Volume of O2 consumed per unit time

Question 3

What happens to the body during inhalation?

Answer 3

The diaphragm contracts and moves down
The chest expands and the rib cage moves out and up
The pressure inside the lungs decreases

Question 4

Is inspiration passive or active

Answer 4

Inspiration is active, exhalation is passive

Question 5

What is the definition of surfactant?

Answer 5

Reduces surface tension to prevent them from collapsing

Question 6

Describe the relationship between airflow and resistance e

Answer 6

Resistance is inversely related to diameter

Question 7

What is the difference between forced vital capacity and forced expiratory capacity for a minute

Answer 7

Forced vital capacity is the maximum amount of air that can be forced out in one breath
Forced expiratory capacity is a measure of how much air is breathed out in one second