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10th Class Biology Chapter 10 Gases Exchange English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

In which of the following disease, the patient has usually lost 50% to 70% of his/her lung tissue when symptoms appears?

Choose an answer

Pneumonia

Asthma

Emphy sema

Bronchitis

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Question # 2

The structural and functional unit of lungs is:

Choose an answer

trachea

pharynx

broncioles

alveolus

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Question # 3

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

Choose an answer

Emphysema

Pneumonia

Bronchitis

Asthma

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Question # 4

What percentage of oxygen inhaled form air during breathing?

Choose an answer

21%

22%

23%

24%

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Question # 5

The respiratory centre is present in :

Choose an answer

Lungs

Brain

Nose

Muscles

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Question # 6

Which gas us absorbed through stomata of plant during night?

Choose an answer

Carbon dioxide

Oxygen

Nitrigen

Hydrogen

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Question # 7

The percentage of oxygen from air which we inspired is:

Choose an answer

15 %

21%

25%

28%

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Question # 8

Which structure actively helps in taking the air out of lungs?

Choose an answer

Nasal cavity

Bronchus

Bronchiole

Diaphragm

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Question # 9

The rate of breathing during exercise or other hard:= physical work is:

Choose an answer

10-20 times

20-30 times

30-40 times

40-50 times

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Question # 10

Cartilage is absent in:

Choose an answer

larynx

trachea

bronchi

bronchioles

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Question # 11

How many carciogens are present in cigarette smoke?

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Question # 12

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.

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Question # 13

Which kind of blood vessels are present around the alveoli?

Choose an answer

Artery

Capillary

Arteriole

Veins

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