3378193
Question 1
Question
All of the following about bronchioles is true except?
Answer
-
Has ciliated cells
-
has cartilage
-
has smooth muscle
-
no mucous production
-
has cilia
-
none of the above
Question 2
Question
Respiratory bronchioles - all of the following are true except?
Answer
-
Belong to the respiratory zone
-
They are the 17-19 degree branches
-
has cilia, smooth muscle and cartilage
-
none of the above
Question 3
Question
Lung region with highest cross sectional area is alveoli
Answer
- True
- False
Question 4
Question
Regarding alveolus
Answer
-
Lined by a single layer of simples squamous epithelium - type I Pneumocytes
-
Type II pneumocytes are cuboidal and secrete surfactant
-
Clara/club cell are found and are similar to stem cell because they can divide and replace other clara cells
-
Alveoli do not contain cilia -> no mucociliary clearance
-
all of the above are correct
Question 5
Question
Regarding the circulating system
Answer
-
Pulmonary capillary pressure = 10 mm of Hg, Pulmonary vein = 6 mmHg, LA = 5 mmHg, LV = 120/0
-
Systemic capillary pressure = 20 mmHg, Systemic Veins 15 mmHg, RA = 2 mmHg, RV = 25/0,
-
In fetus the Pulmonary pressures are very high and systemic pressures are low
-
Adult circulation the Pulmonary pressures are about 1/5 of Systemic circulation
-
All of the above are true
-
1 and 2 are true
Question 6
Question
Alveoli are kept dry because
Answer
-
Air pressure pushes the fluid out of the alveoli into the interstitium
-
Colloid osmotic pressure keeps the fluid in the capillary
-
Hydrostatic pressure in the capillary pushes fluid out into the interstitium
-
Surface tension in the alveolus pulls the fluid out into the alveolus
-
None of the above
-
all of the above
Question 7
Question
Secondary functions of respiratory system are conversion of angiotensin I to angiotensin II, reservoir of blood, maintain blood pH
Answer
- True
- False
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