BIOL 252 – HUMAN ANATOMY & PHYSIOLOGY II (PORTAGE
LEARNING) MODULE 5: THE RESPIRATORY SYSTEM MOST
TESTED QUESTIONS WITH VERIFIED ANSWERS GRADED A+ |
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Question 1
Which structure prevents food from entering the respiratory tract during
swallowing?
Pharynx
(✅) Epiglottis
Larynx
Soft palate
Rationale: The epiglottis closes over the glottis during swallowing,
preventing aspiration into the trachea.
Question 2
The primary function of the nasal conchae is to:
Allow direct passage of air to the alveoli
(✅) Warm, humidify, and filter incoming air Support olfactory
neurons
Separate the nasal cavity from the oral cavity
Rationale: Conchae increase surface area, improving air conditioning
before it reaches the lungs.
Question 3
Which sequence correctly represents the flow of air through the
respiratory tract?
,(✅) Nasal cavity → Pharynx → Larynx → Trachea → Bronchi →
Bronchioles → Alveoli
Nose → Trachea → Lungs → Bronchi → Alveoli
Larynx → Pharynx → Bronchi → Trachea → Alveoli
Alveoli → Bronchi → Larynx → Pharynx
Rationale: Air follows the conducting zone pathway ending in the alveoli
where gas exchange occurs.
Question 4
The trachea is lined with ciliated pseudostratified epithelium because:
(✅) It moves mucus and trapped debris toward the pharynx
It allows gas exchange
It secretes digestive enzymes
It prevents air from entering alveoli
Rationale: Cilia move mucus upward to clear the airways.
Question 5
The alveoli are surrounded by:
Smooth muscle fibers
(✅) Dense capillary networks for gas exchange
Cartilage rings
Mucous glands
Rationale: Thin alveolar walls allow diffusion of gases between air and
blood capillaries.
Question 6
Which of the following is part of the upper respiratory tract?
(✅) Nasal cavity and pharynx
, Lungs
Trachea
Bronchioles
Rationale: The upper tract includes structures above the larynx.
Question 7
During inspiration, the diaphragm:
(✅) Contracts and moves downward
Relaxes and moves upward
Contracts and moves upward
Expands laterally only
Rationale: Diaphragmatic contraction enlarges the thoracic cavity,
reducing pressure to draw in air.
Question 8
Which gas law best describes the inverse relationship between pressure
and volume during breathing?
(✅) Boyle’s Law
Dalton’s Law
Henry’s Law
Charles’ Law
Rationale: Boyle’s Law states that when volume increases, pressure
decreases — key for inspiration.
Question 9
The exchange of gases between alveoli and blood is called:
(✅) External respiration
Internal respiration
Pulmonary ventilation
LEARNING) MODULE 5: THE RESPIRATORY SYSTEM MOST
TESTED QUESTIONS WITH VERIFIED ANSWERS GRADED A+ |
Question 1
Which structure prevents food from entering the respiratory tract during
swallowing?
Pharynx
(✅) Epiglottis
Larynx
Soft palate
Rationale: The epiglottis closes over the glottis during swallowing,
preventing aspiration into the trachea.
Question 2
The primary function of the nasal conchae is to:
Allow direct passage of air to the alveoli
(✅) Warm, humidify, and filter incoming air Support olfactory
neurons
Separate the nasal cavity from the oral cavity
Rationale: Conchae increase surface area, improving air conditioning
before it reaches the lungs.
Question 3
Which sequence correctly represents the flow of air through the
respiratory tract?
,(✅) Nasal cavity → Pharynx → Larynx → Trachea → Bronchi →
Bronchioles → Alveoli
Nose → Trachea → Lungs → Bronchi → Alveoli
Larynx → Pharynx → Bronchi → Trachea → Alveoli
Alveoli → Bronchi → Larynx → Pharynx
Rationale: Air follows the conducting zone pathway ending in the alveoli
where gas exchange occurs.
Question 4
The trachea is lined with ciliated pseudostratified epithelium because:
(✅) It moves mucus and trapped debris toward the pharynx
It allows gas exchange
It secretes digestive enzymes
It prevents air from entering alveoli
Rationale: Cilia move mucus upward to clear the airways.
Question 5
The alveoli are surrounded by:
Smooth muscle fibers
(✅) Dense capillary networks for gas exchange
Cartilage rings
Mucous glands
Rationale: Thin alveolar walls allow diffusion of gases between air and
blood capillaries.
Question 6
Which of the following is part of the upper respiratory tract?
(✅) Nasal cavity and pharynx
, Lungs
Trachea
Bronchioles
Rationale: The upper tract includes structures above the larynx.
Question 7
During inspiration, the diaphragm:
(✅) Contracts and moves downward
Relaxes and moves upward
Contracts and moves upward
Expands laterally only
Rationale: Diaphragmatic contraction enlarges the thoracic cavity,
reducing pressure to draw in air.
Question 8
Which gas law best describes the inverse relationship between pressure
and volume during breathing?
(✅) Boyle’s Law
Dalton’s Law
Henry’s Law
Charles’ Law
Rationale: Boyle’s Law states that when volume increases, pressure
decreases — key for inspiration.
Question 9
The exchange of gases between alveoli and blood is called:
(✅) External respiration
Internal respiration
Pulmonary ventilation
