Question # 1

What percentage of oxygen inhaled form air during breathing?

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21%

22%

23%

24%

A thick muscular layer beneath lungs is called:

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Kidney

Diaphragm

Bladder

Ureter

A cough, mild wheezing, fever chills and shortness of breath are symptoms of:

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Emphysema

Pneumonia

Bronchitis

Asthma

The structural and functional unit of lungs is:

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trachea

pharynx

broncioles

alveolus

Cartilage is absent in:

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larynx

trachea

bronchi

bronchioles

The rate of breathing at rest in human is:

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16-20 times per minute

70-80times per minute

80-100times per minute

10 -20 times per minute

The length of trachea is:

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10 cm

12 cm

22 cm

20 cm

Lungs are enclosed in a membrane called;

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peritonium

pleural membrane

epidermis pericardium

Every year "World Day" is celebrated on:

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31 May

30 May

31 March

21 March

Which bring deoxygenated blood form heart into lungs?

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Pulmonary veins

Pulmonary Artery

Aorta

Wind Pipe

Point out the FALSE statement about respiration.

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Gases can easily pass through the walls of the alveoli

Gas exchange in lungs is very efficient because lungs provide large surface area

In emphysema, the walls of alveoli break and there is more surface area.

Dust particles can damage the lung by irritating the inner alveoli surface.

Stomata are present in:

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Phloem

Xylem

Endodermis

Epidermis

In man the system of gaseous exchange is:

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digestive system

respiratory system

nervous system

excretory system

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