The surfactant lining the fluid of the lung alveoli increases

The skin, the lining of the mouth, the lining of the blood vessels, lung alveoli and kidney tubules are all made of which type of tissue?

A

Epithelial tissue

B

Connective tissue

C

Muscular tissue

D

Nervous tissue

The surfactant lining the fluid of lung alveolar epithelium decreases the

A

Work of breathing

B

Surface tension of the fluid

C

Elasticity of the lungs

D

Compliance of the lungs

E

Pulmonary capillary blood flow

Surfactant of lung alveoli

A

Contains phospholipids

B

Prevents oedema formation in the alveolar wall

C

Stabilizes the size of an alveolus

D

Reduce surface tension by approximately 30%

E

Produces a mononuclear layer

Which type of epithelial tissue allows transportation of substances through a selective permeable surface in the lining of food vessels or lung alveoli?

A

Simple squamous epithelium

B

Stratified squamous epithelium

C

Ciliated columnar epithelium

D

Cuboidal epithelium

Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation?
1. Fluid flow is frictionless & irrotational
2. Fluid flow is steady
3. Fluid flow is uniform & turbulent
4. Fluid is compressible
5. Fluid is incompressible

A

1, 3, 4

B

2, 4, 5

C

1, 2, 5

D

1, 4, 5

If L is total length of a canal in kilometers, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is

A

$$1000\,{\text{PLC}}$$

B

$$\frac{{{\text{PLC}}}}{{1000}}$$

C

$$\frac{{{\text{PL}}}}{{1000{\text{C}}}}$$

D

$$\frac{{{\text{PC}}}}{{100{\text{L}}}}$$

Surfactant lining the fluid on alveolar epithelium

A

Prevents the collapse of the alveoli

B

Increases the compliance of the lungs

C

Reduces the surface tension of the alveolar fluid

D

Increases the elastic recoil pressure of alveoli

E

Increases the work of breathing

Surfactant in alveoli

A

Helps to prevent pulmonary edema

B

Is decreased in cigarette smokers

C

Is influenced by glucocorticoids

D

Promotes alveolar collapse

E

Spread beneath the alveolar epithelium

How much percentage (by volume) of surfactant is generally used in the surfactant compatibility test?

A

2 or 3 %

B

4 or 5 %

C

10%

D

0.1 to 0.2 %

The lung alveoli

A

Are connected to each other to equalize air pressure

B

Need to reduce their surface tension to prevent collapse

C

Are present throughout the respiratory part of the bronchial tree

D

Are lined by larger number of type I pneumocytes than type II pneumocytes

E

Have epithelium without basal lamina

The surfactant lining the fluid of the lung alveoli increases

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