Respiration – structures, pigments, gas transport and regulation - Question Bank
1. Which of the following conditions would DECREASE the release of oxygen from hemoglobin to the tissues?
2. The main function of the respiratory system is to facilitate:
3. The partial pressure of oxygen (PO2) in the tissues is typically around:
4. In which organism is respiration mediated by book lungs?
5. The process of exhalation during normal, quiet breathing is primarily:
6. Which of the following statements about hemoglobin is FALSE?
7. What is the role of the pons in respiratory regulation?
8. The structure that prevents food from entering the trachea is the:
9. What is the approximate percentage of oxygen transported by hemoglobin in the blood?
10. The exchange of gases between the air in the alveoli and the blood in the pulmonary capillaries is called:
11. Which of the following respiratory pigments has the lowest affinity for oxygen?
12. In mammals, the primary muscle involved in quiet inspiration is the:
13. The vocal cords are located within the:
14. What is the partial pressure of carbon dioxide (PCO2) in the alveoli?
15. Which part of the brain contains chemoreceptors that are sensitive to changes in blood CO2 and pH levels?
16. The 'chloride shift' is a process associated with the transport of which gas in red blood cells?
17. Hemerythrin is a respiratory pigment found in some marine invertebrates, which contains:
18. The process of gas exchange between the blood and the body tissues is called:
19. Which group of animals typically uses cutaneous respiration (breathing through the skin)?
20. When the partial pressure of CO2 in the blood increases, what happens to the affinity of hemoglobin for oxygen?
21. What is the primary function of the nasal conchae?
22. The structure that connects the larynx to the bronchi is the:
23. Which of the following has the highest affinity for hemoglobin compared to oxygen?
24. The process by which air moves into and out of the lungs is known as:
25. The respiratory pigment in the blood of some annelids (like earthworms) is dissolved directly in the plasma and is called:
26. What is the primary role of the diaphragm during inspiration?
27. Which chamber of the human heart receives oxygenated blood from the lungs?
28. In terrestrial invertebrates like insects, gas exchange occurs through a system of tubes called:
29. The ' Haldane effect' describes the influence of oxygen levels on the transport of which gas?
30. What is the partial pressure of oxygen (PO2) in the alveoli?
31. Myoglobin is a protein that stores oxygen primarily in which type of tissue?
32. Which part of the respiratory system acts as a common passage for both food and air?
33. The enzyme responsible for catalyzing the formation of bicarbonate ions from carbon dioxide and water in red blood cells is called:
34. What is the main stimulus that triggers an increase in breathing rate?
35. The process of breathing in is called:
36. Which respiratory pigment is found in the blood of some marine worms and contains iron, but is not contained within red blood cells?
37. The movement of gases across the respiratory membrane is driven by:
38. In birds, the respiratory system is unique due to the presence of:
39. Which of the following conditions leads to a decrease in hemoglobin's affinity for oxygen?
40. What is the role of surfactant in the alveoli?
41. The structure responsible for producing vocal sounds is the:
42. Which law states that the volume of a gas is inversely proportional to its pressure at a constant temperature?
43. What is the primary mechanism by which carbon dioxide is transported in the blood?
44. In fish, gas exchange occurs across which specialized structures?
45. The Bohr effect describes the influence of which factor on the oxygen-binding affinity of hemoglobin?
46. Which respiratory pigment is found in the hemolymph of some arthropods and mollusks, and contains copper instead of iron?
47. What is the partial pressure of oxygen (PO2) in deoxygenated blood entering the lungs?
48. The rate of breathing is primarily regulated by the respiratory center located in which part of the brain?
49. What is the main function of the epiglottis?
50. In which part of the human respiratory system does gas exchange primarily occur?