BIOS 252 Week 3 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The main function of the respiratory system is:
A. Circulation
B. Gas exchange
C. Digestion
D. Hormone transport
Correct answer: B
Rationale: Supplies oxygen to blood and removes carbon dioxide.
2. The primary muscle of respiration is:
A. Intercostals
B. Diaphragm
C. Abdominal muscles
D. Pectoralis major
Correct answer: B
Rationale: Contracts to expand thoracic cavity for inhalation.
3. The trachea is lined with:
A. Simple squamous epithelium
B. Pseudostratified ciliated columnar epithelium
C. Stratified squamous epithelium
D. Transitional epithelium
Correct answer: B
Rationale: Cilia and mucus trap debris and move it out of airway.
,4. The bronchi branch into:
A. Alveoli
B. Bronchioles
C. Trachea
D. Larynx
Correct answer: B
Rationale: Smaller airways that lead to alveolar sacs.
5. Gas exchange occurs in:
A. Bronchi
B. Alveoli
C. Trachea
D. Larynx
Correct answer: B
Rationale: Oxygen diffuses into blood; CO₂ diffuses into alveoli.
6. Type I alveolar cells:
A. Produce surfactant
B. Form alveolar walls
C. Fight infection
D. Transport oxygen
Correct answer: B
Rationale: Thin cells allow efficient gas diffusion.
7. Type II alveolar cells:
A. Form alveolar walls
B. Produce surfactant
C. Conduct nerves
D. Form bronchi
Correct answer: B
Rationale: Surfactant reduces surface tension to prevent alveolar
collapse.
, 8. Surfactant function is to:
A. Increase surface tension
B. Reduce surface tension
C. Carry oxygen
D. Produce mucus
Correct answer: B
Rationale: Prevents alveoli from collapsing during exhalation.
9. Pulmonary ventilation refers to:
A. Gas exchange in tissues
B. Movement of air in and out of lungs
C. Blood oxygen transport
D. Breathing rate
Correct answer: B
Rationale: Inhalation and exhalation are part of ventilation.
10. Inhalation occurs when:
A. Diaphragm relaxes
B. Diaphragm contracts
C. Lungs compress
D. Alveoli collapse
Correct answer: B
Rationale: Thoracic volume increases, lowering pressure, drawing
air in.
11. Exhalation is normally:
A. Active process
B. Passive process
C. Requires diaphragm contraction
D. Forced by heart
Correct answer: B
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The main function of the respiratory system is:
A. Circulation
B. Gas exchange
C. Digestion
D. Hormone transport
Correct answer: B
Rationale: Supplies oxygen to blood and removes carbon dioxide.
2. The primary muscle of respiration is:
A. Intercostals
B. Diaphragm
C. Abdominal muscles
D. Pectoralis major
Correct answer: B
Rationale: Contracts to expand thoracic cavity for inhalation.
3. The trachea is lined with:
A. Simple squamous epithelium
B. Pseudostratified ciliated columnar epithelium
C. Stratified squamous epithelium
D. Transitional epithelium
Correct answer: B
Rationale: Cilia and mucus trap debris and move it out of airway.
,4. The bronchi branch into:
A. Alveoli
B. Bronchioles
C. Trachea
D. Larynx
Correct answer: B
Rationale: Smaller airways that lead to alveolar sacs.
5. Gas exchange occurs in:
A. Bronchi
B. Alveoli
C. Trachea
D. Larynx
Correct answer: B
Rationale: Oxygen diffuses into blood; CO₂ diffuses into alveoli.
6. Type I alveolar cells:
A. Produce surfactant
B. Form alveolar walls
C. Fight infection
D. Transport oxygen
Correct answer: B
Rationale: Thin cells allow efficient gas diffusion.
7. Type II alveolar cells:
A. Form alveolar walls
B. Produce surfactant
C. Conduct nerves
D. Form bronchi
Correct answer: B
Rationale: Surfactant reduces surface tension to prevent alveolar
collapse.
, 8. Surfactant function is to:
A. Increase surface tension
B. Reduce surface tension
C. Carry oxygen
D. Produce mucus
Correct answer: B
Rationale: Prevents alveoli from collapsing during exhalation.
9. Pulmonary ventilation refers to:
A. Gas exchange in tissues
B. Movement of air in and out of lungs
C. Blood oxygen transport
D. Breathing rate
Correct answer: B
Rationale: Inhalation and exhalation are part of ventilation.
10. Inhalation occurs when:
A. Diaphragm relaxes
B. Diaphragm contracts
C. Lungs compress
D. Alveoli collapse
Correct answer: B
Rationale: Thoracic volume increases, lowering pressure, drawing
air in.
11. Exhalation is normally:
A. Active process
B. Passive process
C. Requires diaphragm contraction
D. Forced by heart
Correct answer: B
