Q1. Which respiratory disorder is caused by exposure to dust particles in industries such as stone grinding?A. AsthmaB. SilicosisC. EmphysemaD. Bronchitis
Q2. Which of the following statements about carbon dioxide transport is correct?A. CO₂ is mainly transported as bicarbonate ions.B. CO₂ is transported only as dissolved gas in plasma.C. CO₂ has no effect on blood pH.D. All CO₂ is expelled from the body in a single breath.
Q3. Which of the following represents the correct sequence of structures in the human respiratory passage?A. Nostrils → Pharynx → Larynx → Trachea → Bronchi → AlveoliB. Pharynx → Nostrils → Larynx → Trachea → Bronchi → AlveoliC. Nostrils → Larynx → Pharynx → Trachea → Bronchi → AlveoliD. Trachea → Nostrils → Larynx → Pharynx → Bronchi → Alveoli
Q4. What is the primary driving force for oxygen diffusion in the lungs?A. Temperature gradientB. Partial pressure gradientC. pH gradientD. Hemoglobin concentration
Q5. Which of the following statements regarding carbon dioxide transport is incorrect?A. CO₂ is primarily transported as bicarbonate ions.B. Some CO₂ binds to hemoglobin to form carbamino-hemoglobin.C. CO₂ transport does not affect blood pH.D. Carbonic anhydrase catalyzes the conversion of CO₂ into bicarbonate.
Q6. Which of the following factors favors the binding of oxygen to hemoglobin in the lungs?A. High pCO₂B. High H⁺ concentrationC. Low temperatureD. Both 2 and 3
Q7. Which lung capacity includes Tidal Volume and Inspiratory Reserve Volume?A. Vital CapacityB. Expiratory CapacityC. Inspiratory CapacityD. Functional Residual Capacity
Q8. What causes the movement of oxygen from alveoli into the blood?A. Active transportB. OsmosisC. Diffusion due to partial pressure gradientD. Facilitated diffusion
Q10. Where are chemoreceptors that regulate respiration located?A. Alveoli and diaphragmB. Aortic arch and carotid arteryC. Lungs and tracheaD. Bronchi and bronchioles