Prepare for Army AFNS and civilian nursing admissions in one place. Choose a pathway or browse all questions. Each pathway includes common preparation. These are original practice questions, not verified official past papers.
Biology · Question 811
What controls breathing rate?
Lung capacity
Respiratory center in brain
Heart rate
Blood pressure
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Correct answer: B
Respiratory center in brain
Respiratory center in brain is the answer marked in the supplied practice source.
Biology · Question 812
What stimulates increased breathing during exercise?
High carbon dioxide
Low oxygen
High temperature
Low nitrogen
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Correct answer: A
High carbon dioxide
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Biology · Question 813
Comparison of inspired vs expired air shows:
More CO₂ in inspired air
More O₂ in expired air
Less water vapor in expired air
Same nitrogen percentage
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Correct answer: D
Same nitrogen percentage
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Biology · Question 814
What causes bronchitis?
Only viruses
Viruses, bacteria or irritants
Only bacteria
Only genetic factors
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Correct answer: B
Viruses, bacteria or irritants
Viruses, bacteria or irritants is the answer marked in the supplied practice source.
Biology · Question 815
What happens in emphysema?
Alveoli walls destroyed
Mucus production stops
Bronchi inflammation
Lung cancer develops
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Correct answer: A
Alveoli walls destroyed
Alveoli walls destroyed is the answer marked in the supplied practice source.
Biology · Question 816
What fills pneumonia-infected alveoli?
Air bubbles
Fluid and pus
Blood clots
Oxygen
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Correct answer: B
Fluid and pus
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Biology · Question 817
What characterizes asthma?
Lung collapse
Allergic airway narrowing
Bacterial infection
Alveoli destruction
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Correct answer: B
Allergic airway narrowing
Allergic airway narrowing is the answer marked in the supplied practice source.
Biology · Question 818
Main cause of lung cancer?
Exercise
Cold air
Pollen
Smoking
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Correct answer: D
Smoking
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Biology · Question 819
How many carcinogens in cigarette smoke?
About 20
About 10
At least 50
Over 100
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Correct answer: C
At least 50
At least 50 is the answer marked in the supplied practice source.
Biology · Question 820
Effect of CO in smoke?
Reduces oxygen carrying capacity
Stimulates lung growth
Improves oxygen transport
Kills bacteria
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Correct answer: A
Reduces oxygen carrying capacity
Reduces oxygen carrying capacity is the answer marked in the supplied practice source.