11th class (FSc) Biology Unit 13 MCQs
26. Spiracles are found in:
a. Leech
b. Fish
c. Earthworm
d. Cockroach
27. Tiny thin-walled ducts called parabronchi are present in the lungs of:
a. Birds
b. Mammals
c. Reptiles
d. Amphibians
28. The complex cartilaginous structure at the upper end of the trachea is called:
a. Bronchiole
b. Larynx
c. Pharynx
d. Alveoli
29. Number of spiracles in cockroach is:
a. 08 pairs
b. 10
c. 06 pairs
d. 10 pairs
30. Blood is not involved in transport of gas in:
a. Frog
b. Fish
c. Man
d. Insects
31. All the following contain cartilage except:
a. Bronchioles
b. Larynx
c. Bronchi
d. Trachea
32. Blood is not involved in transport of gases in:
a. Earthworm
b. Frog
c. Man
d. Cockroach
33. Syrinx is organ of voice in:
a. Birds
b. Amphibian
c. Mammals
d. Reptiles
34. In the lungs of birds tiny thin walled ducts for constant ventilation are called:
a. Larynx
b. Gill rakes
c. Pharynx
d. Parabronchi
35. Gaseous exchange occur in frog through lungs is called:
a. Pulmonary respiration
b. Cultanous respiration
c. Cellular respiration
d. photo respiration
36. Cartilaginous fishes contain scales:
a. Ganoid
b. Placoid
c. Ctenoid
d. Cycloid
37. The floor of chest cavity in man is:
a. Pleura
b. Diaphragm
c. Ribs
d. Pericardium
38. The total number of exterior paired apertures for respiration in cockroach is:
a. 14
b. 10
c. 20
d. 12
39. Fleura is double layered thin membrane that covers:
a. Liver
b. Heart
c. Kidney
d. Lungs
40. Which one is the structure of respiratory system of man:
a. Syrinx
b. Esophagus
c. Duodenum
d. Larynx
41. Lungs are covered by double layered thin membranous layer called:
a. Larynx
b. Pleura
c. Diaphragm
d. Air sac
42. All are made up of cartilage except:
a. Trachea
b. Bronchiole
c. Larynx
d. Bronchi
43. The diameter of bronchiole is:
a. 1 mm
b. 3 mm
c. 0.1 mm
d. 2 mm
44. Blood is not involved in the transport of gas in:
a. Frog
b. Fish
c. Man
d. Insects
45. The air is directly supplied through tracheoles to tissue cells:
a. Earthworm
b. Birds
c. Fish
d. Cockroach
46. Parabronchi are present only in the lungs:
a. Cat
b. Man
c. Birds
d. Frog
47. Number of air sacs in birds is:
a. 08
b. 06
c. 09
d. 07
48. Respiratory pigment present in muscles is called:
a. Hemoglobin
b. Myoglobin
c. Hemocyanin’s
d. Globin
49. Blood contains ……… oxygen per 100ml of blood when hemoglobin is 98% saturated.
a. 17.6ml
b. 19.6ml
c. 16.6ml
d. 18.6ml
50. How much air can lungs hold when they are fully inflated?
a. 4.5 liters
b. 5 liters
c. 3.5 liters
d. 4 liters