Respiratory System-Mcqs


      Respiratory System-Lungs-Mitochondria
No. Respiratory System
1. The process of releasing the energy through the oxidation of food materials like Glucose, Fatty Acids and Proteins to CO2 and water is called Respiration.
2. In human beings respiration takes place through Lungs.
3. Respiration through lungs is called Pulmonary Respiration.
4. Pulmonary respiration takes place in Mammals, Birds, Reptiles etc.
5. In human beings respiratory system consists Nostrils, Nasal cavities, Pharynx, Larynx, Trachea, Bronchi and Bronchioles and Alveoli.
6. Oral cavity is separated from Nasal cavity by a bony plate called plate.
7. Pharynx is the common passage for food and air.
8. Pharynx is connected to Larynx through Glottis.
9. Larynx is called Voice Box.
10. Epiglottis prevents the passage of food into Larynx.
11. Larynx opens into Trachea.
12. Trachea is also known as Wind Pipe.
13. Cartilagenous rings are present in trachea of man.
14. Trachea divides into two tubes called Branchi.
15. Branchi divide into Branchioles.
16. Lungs are the chief respiratory organs in human beings.
17. A pair of Lungs are present in chest cavity one on either side of the Heart.
18. Lungs are covered with two membrane sac called Pleura.
19. The Pleura membrane protect the Lungs from injury by the fluid present in the space between the two membranes.
20. Right Lung has three lobes whereas left lung has only two lobes.
21. Right Lung is larger than left Lung.
22. Lungs consist several thousands of chambers called Alveoli.
23. Alveolus is the structural and functional unit of the Lung.
24. Exchange of gases takes place in Alveoli.
25. Oxygen from blood enters into tissues and CO2leaves the tissues and enters the blood.
26. Pulmonary artery brings deoxygenated blood from the heart to Lungs.
27. After entering into the Lungs the pulmonary artery divides into several arterioles and capillaries and supply deoxygenated blood to Alveoli.
28. Pulmonary Vein brings oxygenated blood from the Lungs to Heart.
29. Rate of respiration in newly born children is 32 times per minute.
30. Diaphragm plays a major role in respiratory movements.
31. The gas exchange between blood and cells is called Internal Respiration.
32. The gas exchange between blood and respiratory organs is called External respiration.
33. Oxygen carrying protein called haemoglobin is absent in the blood of insects. Hence blood of insects is white in color.
34. Respiration through Gills is called Bronchial respiration. It takes place in fishes and Todpole larva of Frog.
35. Respiration takes place through diffusion in Amoeba, paramoecium and Euglena.
36. Respiration through tracheal tubes is called tracheal respiration. If takes place in cockroach.
37. The color of blood of Cockroach is white.
38. There are 10 pairs of Stigma in Cockroach.
39. Respiration through skin is called cutaneous respiration.
40. In Frog, Earthworm and Salamander respiration takes place through the skin.
41. Frogs jump into water to keep skin wet and moist.
42. In Frog glands on the skin secrete mucus.
43. Cutaneous respiration takes place in Earthworm. Its skin has a large number of blood vessels.
44. Haemoglobin is present in the plasma of blood in Earthworm.
45. Coelomic fluid is present in Earthworm.
46. If the respiration takes place in the presence of oxygen it is called Aerobic respiration.
47. It the respiration takes place in the absence of oxygen it is called anaerobic respiration.
48. Carbon dioxide and water are the end products of Aerobic respiration.
49. In Anaerobic respiration pyruvic acid is converted into ethanol or lactic acid.
50. In Aerobic respiration each molecule of pyruvic acid is oxidized to 3 molecules of CO2.
51. In respiration energy is produced by the oxidation of glucose. This process occurs in cells. Hence it is called cellular respiration.
52. Mitochondria are the energy producing centers in the cell.
53. Mitochondria are called power Houses of the cell.
54. Cellular respiration takes place in Mitochondria.
55. Inner compartment of Mitochondria is called Matrix. Matrix is surrounded by two membranes.
56. Inner membrane of Matrix produces projections into the matrix. These projections are called cristae.
57. Glycolysis is the first in respiration. In glycolysis glucose is converted into two molecules of pyruivic acid.
58. Glycolysis occurs in the cytoplasm of the cell.
59. In kreb's cycle Acetyl coenzyme -A is attached to oxaloacetic acid. This results formation of citric acid.
60. Elementary particles are present on the cristae. Elementary particles have large number of respiratory enzymes.
61. Krebs cycle occurs in the Matrix. Electron transport occurs in the cristate.
62. Oxidative phosphorylation is the process of converting ADP into ATP in respiration.
63. Fermentation is the process of converting pyruvic acid to ethanol by yeast in the absence of oxygen.
64. The bacteria Lactobacillus converts pyruvic acid to lactic acid.
65. One ATP molecule gives 7200 calories of energy.

Respiratory System-Mcqs

Which of the following is necessary for the release of energy present in the food?
a) Nitrogen
b) Oxygen
c) Hydrogen
d) Calcium

Answer:

b


The process of reacting oxygen with food and release of energy is called
a) Oxidation of food
b) Obsorption of food
c) Assimilation of food
d) Digestion of food

Answer:

a


Which of the following is produced during the oxidation of food?
a) Oxygen
b) Hydrogen
c) Nitrogen
d) Carbon dioxide

Answer:

d


Taking in of Oxygen and leaving out of Carbon dioxide is called
a) Absorption
b) Respiration
c) Digestion
d) Assimilation

Answer:

b


Which of the following consists in the respiratory system?
a) Nose and Trachea
b) Pharynx and Larynx
c) Bronchi and Lungs
d) All the above

Answer:

d


Respiratory System-Mcqs