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Form 3: Chapter 2
Respiration
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Name:
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Your answer
Match the following mechanism with the correct process.
*
6 points
Inhalation
Exhalation
Intercostal muscles contracts.
Ribcage moves upwards and outwards.
Diaphragm relaxes and curves upwards.
Volume of thoracic cavity decreases.
Air is rushed into the lungs.
Air is pushed out of the lungs.
Inhalation
Exhalation
Intercostal muscles contracts.
Ribcage moves upwards and outwards.
Diaphragm relaxes and curves upwards.
Volume of thoracic cavity decreases.
Air is rushed into the lungs.
Air is pushed out of the lungs.
Oxygen and carbon dioxide move from high concentration region to low concentration region through diffusion.
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1 point
True
False
Carbon dioxide combines with haemoglobin to form oxyhaemoglobin.
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1 point
True
False
Oxygen dissolves in the alveolus surfaces into the blood capillaries through __________.
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1 point
diffusion
osmosis
transpiration
Diffusion occurs between alveolus and blood capillaries because the concentration of oxygen in the alveolus is ________ than in the blood capillaries.
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1 point
lower
higher
Which of the following enable higher efficiency in gaseous exchange?
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3 points
The wall of alveoli is very thin.
Dry alveolus wall.
Alveolus is covered with networks of blood capillaries.
Consists of millions of alveoli.
Required
Mark (/) for the substances that are harmful to the respiratory system.
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4 points
Pollens
Haze
Carbon monoxide
Dust
Oxygen
Required
Mark (/) for the substances found in the cigarette smoke.
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2 points
Nitrogen dioxide
Acetone
Nicotine
Sulphur dioxide
The skins of amphibians is _________ and very permeable to gas.
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1 point
thin
thick
This system consists of spiracle, trachea, air sacs and tracheole. Which animal below has this type of respiration system?
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1 point
fish
frog
grasshopper
The concentration of carbon dioxide in the cell becomes ________ than the concentration of the carbon dioxide in the spaces between the cells when the cells in the leaves carry out photosynthesis.
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1 point
lower
higher
During night time, water diffuses _________guard cells by osmosis and the vacuole __________.
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1 point
Into, swells
Out from, shrinks
During the day time, guard cells swell up and become __________.
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1 point
Turgid
Flaccid
Which of the following gas increases in percentage composition in exhaled air?
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1 point
Nitrogen
Oxygen
Carbon dioxide
Which of the following contains more oxygen and less carbon dioxide?
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1 point
Red blood cells
White blood cells
Oxygenated blood
Deoxygenated blood
When is the movement of carbon dioxide, oxygen and water vapour at the surface of the leaf likely to be greatest?
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1 point
When the stomata are open
When the stomata are closed
When cool and humid
When hot and dry
Which of the following structures has the function of protecting the lungs?
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1 point
Alveolus
Bronchus
Diaphragm
Rib cage
Match the following diseases to the correct dangerous substances.
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2 points
Cigarette tar
Pollen
Asthma
Lung cancer
Cigarette tar
Pollen
Asthma
Lung cancer
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