PHGY 216 Module 3| Respiratory Physiology MCQs (All Sections) Actual possible 2026 Final Sample questions and explained answers Queen's University

PHGY 216 Module 3| Respiratory Physiology MCQs (All Sections) Actual possible 2026 Final
Sample questions and explained answers Queen's University




MODULE 3 — RESPIRATORY PHYSIOLOGY (ALL SECTIONS)
SECTION 3.1 — Introduction to Respiratory Physiology

1. External respiration refers to:
A. Cellular ATP production
B. Gas exchange between body and atmosphere
C. Movement of nutrients
D. Blood flow in kidneys

Answer: B
Explanation: External respiration is the exchange of O₂/CO₂ between atmosphere and blood.



2. Ventilation is defined as:
A. Gas exchange at tissues
B. Movement of air in and out of lungs
C. Transport of RBCs
D. Transport of electrolytes

Answer: B



3. Gas exchange between alveoli and blood occurs by:
A. Active transport
B. Osmosis
C. Diffusion
D. Bulk flow

Answer: C

,4. Blood gas transport refers to:
A. Movement of hormones
B. Transport of gases in bloodstream
C. Movement of enzymes
D. Ionic transport

Answer: B



5. Internal respiration refers to:
A. O₂ usage in mitochondria
B. Gas exchange in lungs
C. Ventilation rate
D. Blood filtration

Answer: A

, 6. The respiratory system also functions in:
A. Blood reservoir
B. Speech
C. Acid-base balance
D. All of the above

Answer: D



7. Most gas exchange occurs in the:
A. Trachea
B. Primary bronchi
C. Alveoli
D. Larynx

Answer: C



8. Convective flow dominates until:
A. Terminal bronchioles
B. Respiratory bronchioles
C. Alveoli
D. Trachea

Answer: B



9. Diffusive flow begins at:
A. Primary bronchi
B. Terminal bronchioles
C. Respiratory bronchioles
D. Alveolar ducts

Answer: C



10. The diaphragm is classified as a(n):
A. Expiratory muscle
B. Inspiratory muscle
C. Voluntary muscle
D. Smooth muscle

Answer: B



11. The pleural space functions to: