Respiratory System Flashcards
1
Q
What is tidal volume?
A
The amount of air inspired and expired with each breath.
2
Q
What is vital capacity?
A
The maximum amount of air that can be forced out of the lungs in one breath.
3
Q
Define gas exchange.
A
The delivery of oxygen from the lungs to the blood stream and the removal of carbon dioxide via diffusion.
4
Q
What are the percentages of O2 and CO2 in inhaled air?
A
Oxygen - 20% Carbon dioxide - 0.04%
5
Q
What are the percentages of O2 and CO2 in exhaled air?
A
Oxygen - 16% Carbon dioxide - 4%
6
Q
What are 2 characteristics of the alveoli?
A
- Large surface area
- Thin walls
7
Q
What is oxygen debt?
A
The amount of extra oxygen needed at the end of physical activity to break down any lactic acid. Occurs after anaerobic exercise.
