Respiration in Animals (Multiple Choice Questions and Answers)

Respiration in Animals

Multiple Choice Questions and Answers 

1. Volume of air inspired or expired in relaxed position is

(a) 500ml

(b) 300ml

(c) 150 ml

(d) 115 ltr

Answer: (a) 500ml

2. Connecting link between glycolysis and TCA cycle is

(a) acetyl CoA

(b) pyruvate

(c) succinate

(d) fumarate

Answer: (b) pyruvate

3. In which of the following animal respiration occurs without any respiratory organ?

(a) cockroach

(b) fish

(c) frog

(d) earthworm

Answer: (d) earthworm

4. Ciliated cells are found in

(a) bronchus

(b) pancreas

(c) liver

(d) uterus

Answer: (a) bronchus

5.  Buccopharyngeal respiration in frog

(a) is increased when nostrils are closed

(b) stops when there is pulmonary respiration

(c) is increased when it is catching fly

(d) stops when mouth is opened

Answer: (b) stops when there is pulmonary respiration

6. Voice in mammals is produced by

(a) by syrinx

(b) by bronchus

(c) during inhalation

(d) during exhalation

Answer: (d) during exhalation

7. During carbon dioxide transport, HCO3 diffuses from erythrocytes to plasma and in turn affects the ionic equilibrium momentarily. In order to keep the ionic balance, an equal number of C1 ions pass into the erythrocytes from plasma. This process is known as

(a) Hamburger phenomenon

(b) bicarbonate shift

(c) transport rate

(d) carbonation

Answer: (a) Hamburger phenomenon

8. Automobile exhaust causes respiratory problems because of the presence of

(a) CO

(b) CH4

(c) Chlorine

(d) NO2

Answer: (a) CO

9. Book lungs are respiratory organs of

(a) mollusca

(b) mammals

(c) arachnida

(d) earthworm

Answer: (c) arachnida

10. The power house of energy in cells is

(a) golgi bodies

(b) mitochondria

(c) ribosomes

(d) endoplasmic reticulum

Answer: (b) mitochondria

11. The respiratory centre in the brain is stimulated by

(a) carbon dioxide concentration in venous blood

(b) oxygen concentration in artery blood

(c) carbon dioxide concentration in artery blood

(d) oxygen concentration in venous blood

Answer: (c) carbon dioxide concentration in artery blood

12. Arytenoid cartilage occurs in

(a) nose

(b) larynx

(c) hyoid

(d) sternum

Answer: (b) larynx

13. The energy currency of a cell is

(a) AMP

(b) ATP

(c) carbohydrates

(d) NAD

Answer: (b) ATP

14. The net energy yield from aerobic respiration in eukaryotes cell is

(a) 10 ATP

(b) 30 ATP

(c) 36 ATP

(d) 38 ATP

Answer: (c) 36 ATP

15. The volume of air breathed in and out during effortless respiration is referred to as

(a) vital volume

(b) residual volume

(c) ideal volume

(d) tidal volume

Answer: (d) tidal volume

16. Main function of lenticel is

(a) transpiration

(b) guttation

(c) gaseous exchange

(d) bleeding

Answer: (c) gaseous exchange

17. One haemoglobin carry how many molecule of oxygen

(a) 4

(b) 2

(c) 6

(d) 8

Answer: (a) 4

18. Oxyhemoglobin dissociates at

(a) high PO2

(b) low PO2 in tissues

(c) equal PO2

(d) all times irrespective of PO2

Answer: (b) low PO2 in tissues

19. Movement of CO2 and O2 across the alveoli and capillaries takes place by

(a) imbibition

(b) carrier transport

(c) diffusion

(d) active transport

Answer: (c) diffusion

20. CO2 is carried mainly in the form of

(a) bicarbonates

(b) carboxy-haemoglobin

(c) plasma

(d) none of these

Answer: (a) bicarbonates

21. During expiration diaphragm becomes

(a) flattened

(b) dome-shaped

(c) oblique

(d) normal

Answer: (b) dome-shaped

22. Respiratory Quotient is less than 1 for

(a) banana

(b) potato

(c) citrus fruits

(d) castor seeds

Answer: (c) citrus fruits

23. During one circuit of blood from lungs to the tissues and back through circulatory system the percentage of haemoglobin giving up oxygen is

(a) 50%

(b) 25%

(c) 75%

(d) 100%

Answer: (b) 25%

24. The blood leaving the lungs has all its haemoglobin present in oxygenated form and gives up oxygen to the tissues, because

(a) the tissues can absorb oxygen from oxyhaemoglobin

(b) oxygen concentration in tissues is higher and carbon dioxide concentration lower than in the lungs

(c) oxyhaemoglobin undergoes reduction

(d) oxygen concentration in tissues is lower than carbon dioxide concentration higher than in the lungs

Answer: (d) oxygen concentration in tissues is lower than carbon dioxide concentration higher than in the lungs

25. Which of the following facts suggests that oxygen is transported from lungs to the tissue combines with haemoglobin rather than dissolved in blood plasma?

(a) oxygen carrying capacity of whole blood is higher than that of plasma and oxygen content of blood leaving the glands is greater than that of blood entering the lungs

(b) hemoglobin can combine with oxygen

(c) oxyhaemoglobin can dissociate into haemoglobin and oxygen

(d) an increase in carbon dioxide concentration decreases the oxygen affinity of hemoglobin

Answer: (a) oxygen carrying capacity of whole blood is higher than that of plasma and oxygen content of blood leaving the glands is greater than that of blood entering the lungs

26. Body tissues of obtain oxygen from oxyhaemoglobin because of its dissociation caused by

(a) low oxygen concentration

(b) low oxygen and high carbon dioxide concentration

(c) low carbon dioxide concentration

(d) high carbon dioxide concentration

Answer: (b) low oxygen and high carbon dioxide concentration

27. If a person stays on Mount Everest for some days

(a) his blood will step up production of red blood corpuscles

(b) his blood will step down production of red blood corpuscles

(c) there will be no change in the content of red blood corpuscles in his body

(d) his red blood corpuscles will turn into large cells

Answer: (a) his blood will step up production of red blood corpuscles

28. If a man from sea coast of Kerala goes to Mount Everest

(a) his breathing rate and heart beat will increase

(b) his breathing rate and heart beat will decrease

(c) his breathing rate will increase but heartbeat will decrease

(d) his breathing rate will decrease but heartbeat will increase

Answer: (a) his breathing rate and heart beat will increase

29. In which form carbon dioxide is carried in blood

(a) sodium bicarbonate

(b) sodium carbonate

(c) potassium carbonate

(d) magnesium bicarbonate

Answer: (c) potassium carbonate

30. Mammalian lungs contain an enormous number of minute alveoli (air sacs). This is to allow

(a) more space for increasing the total volume of inspired air

(b) more surface area for diffusion of gases

(c) more spongy texture for keeping lungs in proper shape

(d) more nerve supply to keep the organs working more efficiently

Answer: (a) more space for increasing the total volume of inspired air

31. Tidal air in mammalian lungs is

(a) total maximum air that can be drawn into lungs

(b) air that normally goes in and comes out of lungs during breathing

(c) air that is left in the lungs after normal expiration

(d) air that can be expelled out from lungs forcibly after normal expiration

Answer: (b) air that normally goes in and comes out of lungs during breathing

32. The largest quantity of air that can be expired after a maximal inspiratory effort is

(a) residual volume

(b) tidal volume

(c) vital capacity of lungs

(d) lung volume

Answer: (d) lung volume

33. The combination of haemoglobin with oxygen the blood can be promoted by

(a) decreasing oxygen concentration in blood

(b) increasing oxygen concentration in blood

(c) increasing carbon dioxide concentration in blood

(d) introducing CO into blood

Answer: (d) introducing CO into blood

34. When man inhales air containing normal concentration of O2 as well as CO he suffers from suffocation because

(a) CO2 reacts with O2 which is thus removed from air entering the lungs

(b) haemoglobin combines with CO2 instead of with O2 and the product cannot dissociate

(c) CO affects the diaphragm and intercostal muscles

(d) CO affects the nerves of the lungs

Answer: (a) CO2 reacts with O2 which is thus removed from air entering the lungs

35. Sudden deep inspiration is due to

(a) increase in concentration of oxygen

(b) increase in concentration of CO2

(c) decrease in concentration of CO2

(d) either increase in concentration of CO2 or decrease in the concentration of CO2

Answer: (b) increase in concentration of CO2

36. Breathing centre that controls normal breathing in mammals lies in

(a) cerebrum

(b) cerebellum

(c) midbrain

(d) medulla oblongata

Answer: (c) midbrain

37. Major fraction of CO2 released during cellular respiration is transported in blood to the lungs in the form of

(a) HCO3

(b) H2CO3

(c) as free CO2

(d) in combination of HbCO2

Answer: (b) H2CO3

38. A person with high fever may breathe faster than normal this may be due to

(a) additional requirement of O2 for the invader germs

(b) high temperature of body

(c) mental worry of patient

(d) loss of appetite

Answer: (d) loss of appetite

39. The impulse of voluntary forced breathing starts in

(a) medulla

(b) vagus nerve

(c) cerebral hemisphere

(d) spinal cord

Answer: (a) medulla

40. Forced deep breathing for a few minutes by a person sitting at rest may be followed by a temporary cessation of breathing. This influences

(a) too much oxygen in blood

(b) too much CO2 in blood

(c) very little CO2 in blood

(d) both too much O2 and very little CO2 in blood

Answer: (c) very little CO2 in blood

41. Which one of the following does not contribute to the breathing movement in mammals?

(a) ribs

(b) diaphragm

(c) abdominal muscles

(d) larynx

Answer: (a) ribs

42. A man respires about

(a) 16 to 20 times per minute

(b) 40 times per minute

(c) 72 times per minute

(d) 100 times per minute

Answer: (a) 16 to 20 times per minute

43. If under certain conditions the P50 value of haemoglobin rises 100mm Hg, a person will die of oxygen deficiency the pigment

(a) cannot load oxygen in the lungs

(b) can load enough oxygen in the lungs but cannot unload it in tissues

(c) can neither load nor unload oxygen

(d) suffers degradation and cannot function normally

Answer: (d) suffers degradation and cannot function normally

44. Name the respiratory organs of frog

(a) lungs buccal cavity and skin

(b) trachea

(c) gills

(d) none of these

Answer: (a) lungs buccal cavity and skin

45. Vital capacity of an average person is

(a) 4500-5000ml

(b) 4000-4500ml

(c) 3000-3500ml

(d) 2000-2500ml

Answer: (a) 4500-5000ml

46. Name the organ which produces sound

(a) larynx

(b) pharynx

(c) epiglottis

(d) none of these

Answer: (a) larynx

47. Name the respiratory organ of whale

(a) lungs

(b) gills

(c) body surface

(d) trachea

Answer: (a) lungs

48. Name the respiratory organs of leech and prawn

(a) skin spiracles and tracheoles

(b) gills

(c) trachea

(d) none of these

Answer: (a) skin spiracles and tracheoles

49. Foods and air passages cross in the

(a). Larynx

(b). Pharynx

(c). Epiglottis

(d). Trachea

Answer: (b). Pharynx

50. How many lobes are there in human lungs?

(a) left lung has two lobes and right has three

(b) left lung has three lobes and right has two

(c) left lung has two lobes and right has two

(d) left lung has three lobes and right has three

Answer: (a) left lung has two lobes and right has three