Q1. What is the normal partial pressure of oxygen (pO₂) in oxygenated blood?A. 159 mmHgB. 104 mmHgC. 95 mmHgD. 40 mmHg
Q2. Which of the following statements regarding respiratory control is correct?A. The medulla oblongata contains the respiratory rhythm center.B. The pneumotaxic center inhibits inspiration by prolonging inhalation.C. Chemoreceptors detect only oxygen levels in the blood.D. Respiratory rate remains constant regardless of CO₂ concentration.
Q3. Which of the following statements about oxygen transport is correct?A. Most oxygen is carried as bicarbonate ions.B. Oxygen is primarily transported bound to hemoglobin.C. All oxygen in the blood is dissolved in plasma.D. Oxygen transport is not influenced by partial pressure gradients.
Q4. Which part of the respiratory system is commonly known as the "voice box"?A. LarynxB. PharynxC. TracheaD. Bronchi
Q5. Which of the following is NOT a step in the process of respiration?A. Pulmonary ventilationB. Diffusion of gasesC. Gas transportD. Protein synthesis
Q6. Which of the following best describes the function of the epiglottis?A. Facilitates gas exchangeB. Produces soundC. Prevents food from entering the tracheaD. Regulates breathing rate
Q7. Which of the following statements about respiratory volumes is incorrect?A. Tidal Volume is the amount of air exchanged during normal breathing.B. Vital Capacity includes Tidal Volume, Inspiratory Reserve Volume, and Expiratory Reserve Volume.C. Functional Residual Capacity includes Residual Volume and Expiratory Reserve Volume.D. Inspiratory Capacity is equal to Total Lung Capacity.
Q8. Which lung volume represents the maximum amount of air a person can breathe in after a forced expiration?A. Tidal VolumeB. Inspiratory Reserve VolumeC. Vital CapacityD. Total Lung Capacity
Q9. Which of the following statements about CO₂ transport is incorrect?A. CO₂ is primarily transported as bicarbonate ions.B. A portion of CO₂ binds to hemoglobin to form carbamino-hemoglobin.C. CO₂ is mainly transported as dissolved gas in plasma.D. Carbonic anhydrase facilitates CO₂ conversion into bicarbonate ions.
Q10. Which respiratory disorder is characterized by the destruction of alveolar walls, reducing surface area for gas exchange?A. AsthmaB. EmphysemaC. BronchitisD. Pneumonia