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Biology 10th Class English Medium Chapter 10 Online Test MCQs With Answers

Question # 1

The structural and functional unit of lungs is:

Choose an answer

trachea

pharynx

broncioles

alveolus

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Question # 2

Cutting of walls of Alveoli called:

Choose an answer

Pneumonia

Emphysema

Bronchtis

Asthama

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Question # 3

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

Choose an answer

Stomata

Lenticels

Companion cell

Guard cells

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Question # 4

Which diisease is caused by Streptococcus pneumoniae:

Choose an answer

Bronchites

Emphysema

Pneumonia

Asthema

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Question # 5

Which kind of blood vessels are present around the alveoli?

Choose an answer

Artery

Capillary

Arteriole

Veins

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Question # 6

Where does the gaseous exchange occur in humans:

Choose an answer

Pharynx

Larynx

Trachea

Epiglottis

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Question # 7

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.

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Question # 8

C-Shaped cartilaginous rings are present in the wall of.

Choose an answer

Bronchi

Bronchioles

Alveoli

Trachea

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Question # 9

Amount of carbon dioxide in inspired air is:

Choose an answer

16%

0.04%

None of these

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Question # 10

In man the system of gaseous exchange is:

Choose an answer

digestive system

respiratory system

nervous system

excretory system

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Question # 11

How many bronchi are there in the air passageway?

Choose an answer

One

Two

Many

None of these

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Question # 12

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

Choose an answer

30-40 times per minute

50-60 times per minute

60-70 times per minute

70-80 times per minute

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