Punjab 12th Class Biology Respiration Mcqs Test Online Punjab 12th Class Biology Respiration Mcqs Test Online 1234567891011121314Show paginator Hide paginator Page 1 of 1Biology 1. Breathing is an example of 1.Cellular respiration 2.Counter current exchange 3.Diffusion 4.Ventilation 2. How is most of the oxygen transported in the blood? 1.As bicarbonate 2.Bound to hemoglobin 3.Dissolved in plasma 4.Dissolved in water 3. The lateral walls of the chest cavity of man are composed of the: 1.Ribs 2.Ribs, intercostals muscles 3.Intercostals muscles 4.Ribs, intercostals muscles and diaphragm 4. Which sequence most accurately describes the sequence of airflow in the human respiratory system? 1. Pharynx 2. Bronchus 3. Trachea 4. Larynx 5. Alveolus 6. Bronchiole 1.1, 4, 3, 2, 5, 6 2.4, 1, 3, 2, 5, 6 3.1, 4, 3, 2, 6, 54.4, 1, 3, 2, 6, 5 5. Which of the following factors is the most effective in accelerating the rate of breathing in man? 1.An excess of carbon dioxide in the blood2.A lack of oxygen in the tissues 3.A lack of oxygen in the blood 4.An excess of carbon dioxide in the lungs 6. With which other system do specialize respiratory systems most closely interface in exchanging gases between the cells and the environment? 1.The muscular system 2.The excretory system 3.The skin 4.The circulatory system 7. Which event is not associated with the activity of expiration? 1.Backward and downward movement of rib cage 2.More dome like shape of diaphragm 3.Contraction of diaphragm 4.Relaxation of external intercostal muscles 8. The amount of air moved in and out of the lungs with each normal resting breath is the: 1.Residual capacity 2.Tidal volume 3.Vital volume 4.Viral capacity 9. When blood leaves the capillary bed most of the carbon dioxide is in the form of: 1.Hydroxyl ions 2.Bicarbonate ions 3.Hydrogen ions 4.Carbonate ions 10. Pulmonary emphysema: 1.Results from bacterial infection 2.Is uncommon in cigarette smokers 3.Characterized by loss of elasticity of the alveolar walls 4.Results from bronchial constriction 11. Respiratory pigments: 1.All have four haem groups 2.Attach to the alveolar wall 3.Combine reversibly with only oxygen 4.None of these 12. Which of the following changes will increase the body’s rate of carbon dioxide excretion into the alveoli? 1.A decrease in the pulmonary circulation2.Holding the breath 3.A decrease in the partial pressure of carbon dioxide in the alveolar air 4.The breakdown of alveolar tissue as a result of disease 13. When you inhale, the diaphragm? 1.Contracts and moves downward2.Relaxes and moves downward 3.Relaxes and moves upward 4.Contracts and moves upward 14. Which of the following is the respiratory surface in human respiratory system? 1.Bronchi 2.Alveoli 3.Larynx 4.Trachea Loading... Test By Subject Punjab Test By Topics 12th Class Biology You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.