Question # 1

Which kind of blood vessels are present around the alveoli?

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Artery

Capillary

Arteriole

Veins

The primary chemical stimulus for breathing is the concentration of.

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Carbon dioxide in blood.

Oxygen in blood

Carbon oxide in muscles

Oxygen in muscles.

During exercise or other hard physical works the breathing rate may increase up to.

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30-40 times per minute

50-60 times per minute

60-70 times per minute

70-80 times per minute

What type of blood vessels surrounds the alveoli?

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Artery

Arteriole

Capillary

Vein

For gaseous exchange the leaf and young stems have in their epidermis:

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Stomata

Lenticels

Companion cell

Guard cells

How many bronchi are there in the air passageway?

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One

Two

Many

None of these

The major cause of lungs cancer is:

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nicotine

smoking

viral infection

radiation

Rate of breathing depends upon concentration of which gas:

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Oxygen

Carbon dioxide

Nitrogen

Hydrogen

Amount of nitrogen in expired air is:

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70%

80%

79%

4%

All the alveoli of one side unite to form:

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Lung

Kidney

Thorax

Chest Box

How many carciogens are present in cigarette smoke?

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40

50

60

70

Where does the gaseous exchange occur in humans?

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Pharynx

Trachea

Bronchi

Alveoli

Cutting of walls of Alveoli called:

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Pneumonia

Emphysema

Bronchtis

Asthama

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