BIOS 242 Week 7 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of the respiratory system?
A. Produce hormones
B. Gas exchange
C. Filter blood
D. Digest nutrients
Correct Answer: B
Rationale: The respiratory system exchanges oxygen and carbon
dioxide between air and blood.
2. Which structure prevents food from entering the trachea
during swallowing?
A. Epiglottis
B. Larynx
C. Bronchi
D. Alveoli
Correct Answer: A
,Rationale: The epiglottis folds over the glottis to protect the airway
during swallowing.
3. Which cells produce surfactant in the alveoli?
A. Type I alveolar cells
B. Type II alveolar cells
C. Macrophages
D. Goblet cells
Correct Answer: B
Rationale: Type II alveolar cells secrete surfactant to reduce
alveolar surface tension.
4. Which cells form the alveolar walls and allow gas exchange?
A. Type I alveolar cells
B. Type II alveolar cells
C. Macrophages
D. Goblet cells
Correct Answer: A
Rationale: Type I cells are thin and facilitate diffusion of oxygen
and carbon dioxide.
5. Which structure connects the larynx to the bronchi?
A. Trachea
B. Alveoli
C. Bronchioles
,D. Nasopharynx
Correct Answer: A
Rationale: The trachea conducts air from the larynx to the bronchi.
6. Which structure contains cartilage to prevent collapse?
A. Bronchi
B. Bronchioles
C. Alveoli
D. Terminal bronchioles
Correct Answer: A
Rationale: Bronchi have cartilage rings to maintain airway patency.
7. Which is the main muscle for quiet inspiration?
A. Diaphragm
B. Internal intercostals
C. External intercostals
D. Abdominals
Correct Answer: A
Rationale: Diaphragm contraction increases thoracic volume to
draw air in.
8. Which muscles aid 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.
9. Which lung volume cannot be measured by spirometry?
A. Tidal volume
B. Residual volume
C. Inspiratory reserve volume
D. Expiratory reserve volume
Correct Answer: B
Rationale: Residual volume remains in the lungs after maximal
exhalation.
10. What is tidal volume?
A. Air inhaled or exhaled at rest
B. Air exhaled beyond normal exhalation
C. Inspiratory reserve volume
D. Residual volume
Correct Answer: A
Rationale: TV represents the normal volume of air exchanged
during quiet breathing.
11. What is inspiratory reserve volume (IRV)?
A. Air exhaled beyond tidal volume
B. Extra air inhaled beyond tidal volume
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of the respiratory system?
A. Produce hormones
B. Gas exchange
C. Filter blood
D. Digest nutrients
Correct Answer: B
Rationale: The respiratory system exchanges oxygen and carbon
dioxide between air and blood.
2. Which structure prevents food from entering the trachea
during swallowing?
A. Epiglottis
B. Larynx
C. Bronchi
D. Alveoli
Correct Answer: A
,Rationale: The epiglottis folds over the glottis to protect the airway
during swallowing.
3. Which cells produce surfactant in the alveoli?
A. Type I alveolar cells
B. Type II alveolar cells
C. Macrophages
D. Goblet cells
Correct Answer: B
Rationale: Type II alveolar cells secrete surfactant to reduce
alveolar surface tension.
4. Which cells form the alveolar walls and allow gas exchange?
A. Type I alveolar cells
B. Type II alveolar cells
C. Macrophages
D. Goblet cells
Correct Answer: A
Rationale: Type I cells are thin and facilitate diffusion of oxygen
and carbon dioxide.
5. Which structure connects the larynx to the bronchi?
A. Trachea
B. Alveoli
C. Bronchioles
,D. Nasopharynx
Correct Answer: A
Rationale: The trachea conducts air from the larynx to the bronchi.
6. Which structure contains cartilage to prevent collapse?
A. Bronchi
B. Bronchioles
C. Alveoli
D. Terminal bronchioles
Correct Answer: A
Rationale: Bronchi have cartilage rings to maintain airway patency.
7. Which is the main muscle for quiet inspiration?
A. Diaphragm
B. Internal intercostals
C. External intercostals
D. Abdominals
Correct Answer: A
Rationale: Diaphragm contraction increases thoracic volume to
draw air in.
8. Which muscles aid 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.
9. Which lung volume cannot be measured by spirometry?
A. Tidal volume
B. Residual volume
C. Inspiratory reserve volume
D. Expiratory reserve volume
Correct Answer: B
Rationale: Residual volume remains in the lungs after maximal
exhalation.
10. What is tidal volume?
A. Air inhaled or exhaled at rest
B. Air exhaled beyond normal exhalation
C. Inspiratory reserve volume
D. Residual volume
Correct Answer: A
Rationale: TV represents the normal volume of air exchanged
during quiet breathing.
11. What is inspiratory reserve volume (IRV)?
A. Air exhaled beyond tidal volume
B. Extra air inhaled beyond tidal volume
