BIOS 242 Week 7 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the main function of the alveoli?
A. Transport blood
B. Gas exchange
C. Produce mucus
D. Protect airways
Correct Answer: B
Rationale: Alveoli provide a large surface area for oxygen and CO₂
diffusion.
2. Which cells in alveoli produce surfactant?
A. Type I alveolar cells
B. Type II alveolar cells
C. Goblet cells
D. Macrophages
Correct Answer: B
,Rationale: Surfactant reduces surface tension to prevent alveolar
collapse.
3. What type of epithelium lines most of the respiratory tract?
A. Simple squamous
B. Pseudostratified ciliated columnar
C. Stratified squamous
D. Simple cuboidal
Correct Answer: B
Rationale: Ciliated epithelium with goblet cells traps particles and
moves mucus.
4. Which structure prevents food from entering the airway during
swallowing?
A. Larynx
B. Epiglottis
C. Bronchi
D. Trachea
Correct Answer: B
Rationale: The epiglottis covers the glottis to protect the airway.
5. What is the main function of the larynx?
A. Gas exchange
B. Voice production and airway protection
C. Mucus secretion
,D. CO₂ transport
Correct Answer: B
Rationale: Vocal cords in the larynx produce sound, and it prevents
aspiration.
6. Which muscle is primarily responsible for quiet inspiration?
A. Diaphragm
B. External intercostals
C. Internal intercostals
D. Abdominals
Correct Answer: A
Rationale: Diaphragm contraction increases thoracic volume for air
inflow.
7. Which muscles assist in forced expiration?
A. Diaphragm
B. Internal intercostals and abdominals
C. External intercostals
D. Pectorals
Correct Answer: B
Rationale: These muscles reduce thoracic volume to expel air.
8. Which lung volume cannot be measured by simple spirometry?
A. Tidal volume
B. Residual volume
, C. Vital capacity
D. Inspiratory reserve volume
Correct Answer: B
Rationale: Residual volume remains in lungs after maximal
exhalation.
9. Which lung volume represents air inhaled beyond tidal
volume?
A. Expiratory reserve volume
B. Inspiratory reserve volume
C. Residual volume
D. Tidal volume
Correct Answer: B
Rationale: IRV is the extra air taken in during deep inhalation.
10. What is the function of surfactant?
A. Trap dust
B. Reduce alveolar surface tension
C. Facilitate CO₂ binding
D. Produce mucus
Correct Answer: B
Rationale: Surfactant prevents alveoli from collapsing during
exhalation.
11. What is tidal volume?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the main function of the alveoli?
A. Transport blood
B. Gas exchange
C. Produce mucus
D. Protect airways
Correct Answer: B
Rationale: Alveoli provide a large surface area for oxygen and CO₂
diffusion.
2. Which cells in alveoli produce surfactant?
A. Type I alveolar cells
B. Type II alveolar cells
C. Goblet cells
D. Macrophages
Correct Answer: B
,Rationale: Surfactant reduces surface tension to prevent alveolar
collapse.
3. What type of epithelium lines most of the respiratory tract?
A. Simple squamous
B. Pseudostratified ciliated columnar
C. Stratified squamous
D. Simple cuboidal
Correct Answer: B
Rationale: Ciliated epithelium with goblet cells traps particles and
moves mucus.
4. Which structure prevents food from entering the airway during
swallowing?
A. Larynx
B. Epiglottis
C. Bronchi
D. Trachea
Correct Answer: B
Rationale: The epiglottis covers the glottis to protect the airway.
5. What is the main function of the larynx?
A. Gas exchange
B. Voice production and airway protection
C. Mucus secretion
,D. CO₂ transport
Correct Answer: B
Rationale: Vocal cords in the larynx produce sound, and it prevents
aspiration.
6. Which muscle is primarily responsible for quiet inspiration?
A. Diaphragm
B. External intercostals
C. Internal intercostals
D. Abdominals
Correct Answer: A
Rationale: Diaphragm contraction increases thoracic volume for air
inflow.
7. Which muscles assist in forced expiration?
A. Diaphragm
B. Internal intercostals and abdominals
C. External intercostals
D. Pectorals
Correct Answer: B
Rationale: These muscles reduce thoracic volume to expel air.
8. Which lung volume cannot be measured by simple spirometry?
A. Tidal volume
B. Residual volume
, C. Vital capacity
D. Inspiratory reserve volume
Correct Answer: B
Rationale: Residual volume remains in lungs after maximal
exhalation.
9. Which lung volume represents air inhaled beyond tidal
volume?
A. Expiratory reserve volume
B. Inspiratory reserve volume
C. Residual volume
D. Tidal volume
Correct Answer: B
Rationale: IRV is the extra air taken in during deep inhalation.
10. What is the function of surfactant?
A. Trap dust
B. Reduce alveolar surface tension
C. Facilitate CO₂ binding
D. Produce mucus
Correct Answer: B
Rationale: Surfactant prevents alveoli from collapsing during
exhalation.
11. What is tidal volume?
