Type I alveolar cells line what percentage of the alveolar surface?
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23%
40%
16%
55%
59%
95%
2%
100%
Which cells constitute the alveolar side of the blood-air barrier?
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13%
Type II alveolar cells
63%
Type I alveolar cells
16%
Brush cells
8%
Capillary endothelial cells
What is the role of pinocytotic vesicles in Type I alveolar cells?
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13%
Secretion of surfactant
19%
Gas exchange
61%
Turnover of surfactant and removal of small foreign particles
6%
Cell division
Type II alveolar cells are also known as:
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15%
Septal cells
21%
Pneumocytes
55%
Both A and B
9%
Neither A nor B
What percentage of the alveolar surface do Type II alveolar cells cover?
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59%
5%
14%
40%
16%
60%
11%
95%
Type II alveolar cells are precursors for:
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6%
Type I alveolar cells only
13%
Type II alveolar cells only
81%
Both Type I and Type II alveolar cells
0%
Neither Type I nor Type II alveolar cells
Lamellar bodies in Type II alveolar cells contain:
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0%
Only lipids
7%
Only proteins
89%
A variety of lipids, phospholipids, and proteins
4%
Only phospholipids
The primary function of pulmonary surfactant is to:
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14%
Increase surface tension
76%
Decrease surface tension
8%
Facilitate gas exchange
2%
Promote cell division
What is the shape of Type I alveolar cells?
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30%
Cuboidal
6%
Columnar
58%
Squamous
6%
Spherical
Type II alveolar cells secrete surfactant to:
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85%
Prevent lung collapse during expiration
4%
Increase oxygen absorption
7%
Enhance carbon dioxide release
4%
Stimulate immune response
The alveolar epithelium is composed of:
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3%
Only Type I alveolar cells
3%
Only Type II alveolar cells
93%
Type I alveolar cells, Type II alveolar cells, and occasional brush cells
0%
Type I alveolar cells and capillary endothelial cells
Which statement is true regarding Type I alveolar cells?
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3%
They are capable of cell division
69%
They are not capable of cell division
21%
They are the main source of surfactant
7%
They are cuboidal in shape
Type II alveolar cells are characterized by:
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71%
A rounded central nucleus with nucleolus
0%
A thin squamous shape
13%
Absence of lamellar bodies
17%
Presence of cilia
The connective tissue between adjacent alveoli is known as:
Anonymous Quiz
30%
Alveolar sac
59%
Alveolar septum
8%
Respiratory bronchiole
3%
Capillary bed
What is the primary component of the blood-air barrier inside the interalveolar septum?
Anonymous Quiz
9%
Type II Alveolar cells
9%
Macrophages
76%
Type I Alveolar cells and associated structures
6%
Leucocytes
......... are the most numerous cells in respiratory epithelium
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13%
Mucus cells
70%
Ciliated
7%
Brush
9%
Basal
........ act as receptor for cough reflex
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9%
Olfactory neurons
76%
Brush
11%
Small granule cells
4%
Ciliated
Which cells form the alveolar side of the blood-air barrier?
Anonymous Quiz
15%
Endothelial cells
72%
Type I alveolar cells
8%
Type II alveolar cells
5%
Macrophages
The trachea include all the following except
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2%
Submucosa
68%
Muscularis mucosa
8%
Adventitia
9%
Mucosa
13%
Non of the above