Breathing And Lung Volume Capacities Flashcards
1
Q
Lung volume and air capacities
A
- amounts of air drawn in and out during inspiration or exhalation
- influenced by:
- size, sex, age, physical condition
2
Q
Tidal volume
A
-amount of air moved in and out during abnormal breath (0.5 L)
3
Q
Inspiratory reserve volume
A
-how much more air can be forcibly drawn (3.1 L)
4
Q
Expiratory reserve volume
A
-how much air can be forced out (1.2 L)
5
Q
Residual volume
A
Volume remaining after a forceful expiration (1.2 L)
-keeps alveoli inflated
6
Q
Vital capacity
A
= tidal volume + inspiratory reserve volume + expiratory reserve volume
7
Q
Total capacity
A
= vital capacity + residual volume
8
Q
Anatomical dead space
A
- 1/3 of tidal volume but can increase
- gas that rests in conducting zone
