Respiratory Physiology Lecture 1.2: Respiratory and conducting zones Flashcards
1
Q
What are the 2 airway zones beyond the larynx?
A
- conducting zone
- respiratory zone
2
Q
conducting zone
A
Leads gas to the gas exchanging region of lungs, “anatomical dead space”
- (~ 150 mL)
- NO alveoli
- NO gas exchange
3
Q
Structures included in the conducting zone
A
- trachea
- bronchi
- bronchioles
- terminal bronchioles
4
Q
Respiratory zone
A
Where gas exchange happens
- It contains alveoli
- start of sparse than becomes more numerous
5
Q
What is the smallest airway without alveoli?
A
terminal bronchioles
6
Q
Which zone does gas exchange occur in?
A
conducting zone
7
Q
Number of branches in the respiratory bronchioles
A
500,000 - 1,000,000
8
Q
Which zone has alveoli?
A
respiratory zone
9
Q
What changes occur in the cross-sectional area of airways through successive generations of branching from the trachea to the alveolar sacs?
A
- diameter and length decrease
- number of branches and total cross-section area increase?
10
Q
How mny generations of branching are there?
A
23
