Question # 1

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

Lungs are enclosed in a membrane called;

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peritonium

pleural membrane

epidermis pericardium

Power of speaking is only gifted to:

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Human being

Monkey

Parrot

Crow

What happens during Exhalation?

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Ribs muscles relax

Diaphragm become dome shaped

Pressure on lungs increased

All of these

The structural and functional unit of lungs is:

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trachea

pharynx

broncioles

alveolus

The process of gaseous exchange involves.

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Break down of C-H bounds to yield energy.

Physical movements that take air ain and our of body

Getting oxygen from the air and removing carbon dioxide

Transport of oxygen by the blood to different parts of the body.

Every year "World Day" is celebrated on:

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31 May

30 May

31 March

21 March

Percentage of CO₂ in exhaled are during breathing is:

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16%

4%

79%

0.04%

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.

How many carciogens are present in cigarette smoke?

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40

50

60

70

Most of the gaseous exchange in a leaf occurs through:

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Stomata

General surface

Cuticle

Lenticels

In plants, gaseous exchange takes place as:

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CO2 is removed and O2 is absorbed

CO2 is absorbed and O2 is removed

CO2 and O2 both are absorbed

CO2 and O2 both are removed

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