What is respiration?
Ventilation
Exchange of Gases
Process by which the body takes in and utilises oxygen and removes carbon dioxide
Which of the following are features of the bronchial tree?
Highly branched
Tubes become narrower and shorter
Tubes become narrower and longer
Where does gas exchange occur?
Conducting zone
Respiratory zone
Where does the respiratory zone begin?
Root of the lung
Pharynx
Bronchioles
Alveoli
Bronchus
How many alveolar ducts is there?
1.5-2 million
1.5-2 thousand
1.2-1.5 million
1.2-1.5 thousand
What is the diameter of the alveoli?
0.25mm-0.5mm
0.25-0.5 micrometres
0.1-0.2mm
0.1-0.2 micrometres
Where does 95-97% of total gas exchange occur?
Type I Alveoli
Type II Alveoli
Which of the following are features of Type I Alveoli?
Very thin walls
Metabolically relatively inert
Metabolically relatively active
Increase in number after birth
Increase in size after birth
limited repair capacity
Which of the following are functions of the respiratory system?
Olfaction
Temperature regulation
Conversion of angiotensin II to angiotensin III
Enchance venous return
Secretion of mucus
Generate force
Small particles lodeged in the conducting airways are removed by a stream of mucus propelled by ciliary action towards the bronchioles.
How are particles in the alveoli removed?
Ingested by wandering macrophages
Mucociliary escalator
Where are vibrissae located?
Nose
Nasopharynx
Oropharynx
Where a re submucosal lymphatics and capillaries located?
nose
nasopharynx
tracheobronchial tree
trachea
alveoli
primary bronchi
What is PCD?
What does CFTR stand for? Conductance
What is Ireland'd most common life- threatening genetically inherited disease?
Ireland has an incidence for cystic fibrosis 4 times that of the US
How many generations make up the conducting airways
12
14
16
18
How many generations make up the respiratory zone?
6
7
8
9
Forward velocity of air during inspiration becomes very small in the region of the respiratory bronchioles
F = ΔP/R Which of the following are correct?
ΔP = difference between intra‐alveolar and atmospheric pressure
R = airway resistance
F= rate of air flow
F= viscosity
R= alveolar resistance
