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Question 1
Question
Which statement best reflects the composition of atmospheric air at sea level?
Answer
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oxygen 21%, carbon dioxide 0.04%, nitrogen 78%
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oxygen 18%, carbon dioxide 0.01%, nitrogen 81%
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oxygen 15%, carbon dioxide 0.04%, nitrogen 85%
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oxygen 24%, carbon dioxide 0.01%, nitrogen 76%
Question 2
Question
Identify the correct sequence of the organs of the respiratory passageway.
Answer
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nasal cavity, larynx, pharynx, trachea, bronchus, bronchioles
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nasal cavity, pharynx, larynx, trachea, bronchus, bronchioles
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nasal cavity, pharynx, larynx, bronchus, trachea, bronchioles
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nasal cavity, larynx, pharynx, trachea, bronchus, alveolus, bronchioles
Question 3
Question
Which statement reflects the four major processes involved in respiration?
Answer
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inspiration, expiration, pulmonary ventilation, transport of respiratory gases
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pulmonary ventilation, inspiration, external respiration, expiration
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pulmonary ventilation, external respiration, transport of respiratory gases, internal respiration
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inspiration, expiration, external respiration, transport of respiratory gases.
Question 4
Question
Tidal volume is;
Answer
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the amount of exchangable air
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the amount of air that can still be exhaled (forcibly) after a normal exhalation
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respiratory volume inhaled and exhaled during normal breathing
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air in respiratory passages that does not contribute to gas exchange
Question 5
Question
Gas exchange between pulmonary capillaries and pulmonary alveoli occurs as a result of
Answer
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osmosis
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diffusion
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active transport
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breathing
Question 6
Question
Diffusion of gases is the transfer of molecules;
Answer
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from an area of high concentration to an area of low concentration
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from an area of low concentration to an area of high concentration
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from an area of high concentration to an area of low concentration that requires cellular energy
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from an area of low concentration to an area of high concentration that requires cellular energy
Question 7
Question
Internal respiration is;
Answer
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the process of breathing in and out
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gas exchange between the pulmonary alveoli and pulmonary capillaries
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gas exchange between tissue capillaries and tissue cells
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gas exchange in the nasal passages
Question 8
Question
The level of carbon dioxide in the blood is initially detected by
Answer
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chemoreceptors in the aortic and carotid bodies
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stretch receptors in the lungs
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the pons centre
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inspiratory centre in the brain
Question 9
Question
The most powerful stimulant that increases the rate and depth of respiration in a healthy person is;
Answer
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the rising level of oxygen and carbon dioxide in the blood
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the rising level of carbon dioxide in the blood
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the rising level of oxygen in the blood
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the low levels of oxygen in the blood
Question 10
Question
Which statement best describes the transport of oxygen and carbon dioxide in the blood?
Answer
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oxygen, attached to haemoglobin, is transported to the cells and most of the carbon dioxide is carried in plasma as bicarbonate ions, from the cells.
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oxygen, attached to haemoglobin is transported from cells and most carbon dioxide is carried in plasma as bicarbonate ions to the cells
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the majority of oxygen and carbon dioxide are carried in plasma, oxygen to the cells and carbon dioxide from the cells
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the majority of oxygen and carbon dioxide is carried by haemoglobin, carbon dioxide to the cells and oxygen away from the cells
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