Circulation in Animals
Multiple Choice Questions and Answers
1. In which animal haemoglobin is dissolved
(a) cockroach
(b) earthworm
(c) frog
(d) rabbit
Answer: (b) earthworm
2. Chordae tendinae occur in
(a) ventricles of heart
(b) auricles of heart
(c) aorta
(d) ventricles of brain
Answer: (a) ventricles of heart
3. Heart beat initiates from
(a) Auriculo-ventricular
(b) Sino-auricular node
(c) Bundle of His
(d) Purkinje fibres
Answer: (b) Sino-auricular node
4. Nerves attached to heart are meant for
(a) initiation of heart beat
(b) release of acetylcholine
(c) release of adrenaline
(d) regulation of heart beat
Answer: (d) regulation of heart beat
5. Vagus nerve on stimulation will cause heart rate to
(a) decrease
(b) increase
(c) no change
(d) none
Answer: (a) decrease
6. Sympathetic nerve increases heart pain due to release of acid alkaline inhibition of
(a) release of acetylcholine
(b) inhibition of acetylcholine
(c) release of non-adrenaline
(d) ) inhibition of adrenaline
Answer: (c) release of non-adrenaline
7. Vein differs from artery in having
(a) narrow lumen
(b) strong muscular walls
(c) pigmented wall
(d) valves
Answer: (d) valves
8. Pulmonary vein carries
(a) impure blood from lungs
(b) impure blood from heart
(c) pure blood from lungs
(d) pure blood from heart
Answer: (d) pure blood from heart
9. Renal portal system is absent in
(a) mammals
(b) birds
(c) reptiles
(d) amphibians
Answer: (a) mammals
10. Open blood vascular system is found in
(a) Cockroach
(b) Earthworm
(c) Bird
(d) Mammal
Answer: (a) Cockroach
11. Blood and lymph differ in
(a). Blood has RBCs which are absent in lymph
(b). Blood has WBCS which are absent in lymph
(c). Blood has cells while lymph is without cells
(d). Blood has several inorganic substances absent in lymph
Answer: (a). Blood has RBCs which are absent in lymph
12. In sun the face becomes reddish due to
(a) effect of light
(b) expansion of blood capillaries
(c) breakup of RBC and release of haemoglobin
(d) irritation of skin
Answer: (b) expansion of blood capillaries
13. Instrument for hearing heart beat is
(a) Sphygmomanometer
(b) Electric Cardiograph
(c) Eco cardio graph
(d) Stethoscope
Answer: (a) Sphygmomanometer
14. Lung fish have ………….chambered heart
(a) 2
(b) 4
(c) 3
(d) 1
Answer: (c) 3
15. Average heart beat/ pulse rate in adult human being is
(a) 100/minute
(b) 80/minute
(c) 72/minute
(d) 60/minute
Answer: (c) 72/minute
16. Normal blood pressure in an adult human being is
(a) 120/80
(b) 100/ 60s
(c) 150/100
(d) 200/110
Answer: (a) 120/80
17. Heart covering is
(a) peritoneum
(b) pleural membrane
(c) pericardium
(d) visceral membrane
Answer: (c) pericardium
18. Hepatic portal system starts from
(a) digestive system to liver
(b) kidney to liver
(c) kidney to liver
(d) liver to kidney
Answer: (a) digestive system to liver
19. Circulation of blood was discovered by
(a) Darwin
(b) Harvey
(c) Aristotle
(d) Lister
Answer: (b) Harvey
20. Which of the following statements is true
(a) All veins carry deoxygenated blood
(b) All arteries carry oxygenated blood
(c) All veins except one carry oxygenated blood
(d) All arteries except one carry oxygenated blood
Answer: (d) All arteries except one carry oxygenated blood
21. Blood capillaries are made of
(a) endothelium, connective tissue and muscle fibres
(b) endothelium and muscle fibres
(c) endothelium and connective tissue
(d) endothelium only
Answer: (d) endothelium only
22. If the heart is cut out from the body of frog
(a) it will continue beating for a long time if it is kept moist
(b) it will continue beating for a long time if it is kept dry
(c) it will not beat at all
(d) none of these
Answer: (a) it will continue beating for a long time if it is kept moist
23. Cells found in bone marrow include
(a) ABC
(b) RBC and leukocytes
(c) leukocytes
(d) lymphocytes
Answer: (b) RBC and leukocytes
24. RBC in mammals have no nucleus because
(a) it has degenerated during development
(b) they do not have nucleus since early
(c) nucleus is harmful for RBC
(d) nucleus decreases surface area
Answer: (a) it has degenerated during development
25. Presence of RBC in urine is known as
(a) proteinuria
(b) alkaptonuria
(c) hematuria
(d) uraethiasis
Answer: (c) hematuria
26.Which of the following blood vessels in the circulatory system of frog has more oxygenated blood?
(a) pulmocutaneous artery
(b) pulmocutaneous vein
(c) pulmonary artery
(d) precaval veins
Answer: (b) pulmocutaneous vein
27. During the process of blood circulation vitamin K helps in the
(a) conversion of prothrombin to thrombin
(b) conversion of fibrinogen to fibrin
(c) formation of thromboplastin
(d) formation of prothrombin
Answer: (d) formation of prothrombin
28. Canal system is found in
(a) Sponges
(b) Coelenterates
(c) Flatworms
(d) Annelids
Answer: (a) Sponges
29. pH of blood in arteries and veins is
(a) more in veins and less in arteries
(b) more in arteries and less in veins
(c) same
(d) not definite
Answer: (b) more in arteries and less in veins
30. If haemoglobin is replaced by haemocyanin, the blood will carry
(a) less oxygen
(b) more oxygen
(c) no oxygen
(d) same amount of oxygen
Answer🙁 a) less oxygen
31. Which one of the following term is not applicable to coagulation of blood?
(a) fibrin
(b) fibrinogen
(c) calcium
(d) bilirubin
Answer: (d) bilirubin
32. Major part of the plasma consists of
(a) blood cells
(b) inorganic substances
(c) organic substances
(d) water
Answer: (d) water
33. Which is correct about leukocytes?
(a) They are red coloured
(b) They can cross capillaries
(c) They are enucleate
(d) Decrease in their number causes leukemia
Answer: (b) They can cross capillaries
34. Pulmonary artery differs from pulmonary vein in having
(a) thick wall
(b) thin wall
(c) valves
(d) both B and C
Answer: (a) thick wall
35. Adrenaline directly affects on
(a) S.A. Node
(b) Beta cells of langerhans
(c) Dorsal root of spinal cord
(d) Epithelial cells of stomach
Answer: (a) S.A. Node
36. Continuous bleeding from an injured part of body is due to deficiency of
(a) vitamin A
(b) vitamin B
(c) vitamin K
(d) vitamin E
Answer: (c) vitamin K
37. Impulse of heartbeat originates from
(a) S.A Node
(b) AV node
(c) vagus nerve
(d) cardiac nerve
Answer: (a) S.A Node
38.What should be the blood types of parents in the children having only A and B types of blood?
(a) A and O
(b) AB and A
(c).AB and O
(d) A and B
Answer: (c).AB and O
39. Heart of elephant is
(a) neurogenic
(b) myogenic
(c) both a and b
(d) none of these
Answer: (b) myogenic
40. Open vascular system is found in
(a) Man
(b) Fish
(c) Prawn
(d) Snake
Answer: (c) Prawn
41. Pulmonary artery carries
(a) pure blood from lungs
(b) impure blood from lungs
(c) impure blood to lungs
(d) pure blood to lungs
Answer: (c) impure blood to lungs
42. Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?
(a) urea 5 to 10 mg/100 ml of blood
(b) blood sugar (fasting) 80-100 mg/100ml
(c) total blood volume-3-4 litres
(d) ESR in wintrobe method- 9-15mm in males and 20-34mm in females.
Answer: (b) blood sugar (fasting) 80-100 mg/100ml
43. Which one of the following is a matching pair?
(a) Luub- sharp closure of AV valves at the beginning of ventricular systole
(b) Dup- sudden opening of semilunar valves are the beginning of ventricular diastole
(c) pulsation of the radial artery-valves in the blood vessels
(d) initiation of heart beat- purkinje fibres
Answer: (a) Luub- sharp closure of AV valves at the beginning of ventricular systole
44. Bundle of His is a network of
(a) muscle fibres distributed throughout the heart walls
(b) muscle fibres found only in the ventricle wall
(c) nerve fibres distributed in ventricles
(d) nerve fibres found throughout the heart
Answer: (b) muscle fibres found only in the ventricle wall
45. Systemic heart refers to
(a) the heart that contracts under stimulation from nervous system
(b) left auricle and left ventricle in higher vertebrates
(c) entire heart in lower vertebrates
(d) the two ventricles together in human
Answer: (b) left auricle and left ventricle in higher vertebrates
46. Thoracic duct in humans is associated with
(a) aorta
(b) left subclavian vein
(c) right subclavian vein
(d) hepatic duct
Answer: (b) left subclavian vein
47. Nucleated biconvex RBCs are found in
(a) rat
(b) human
(c) dog
(d) frog
Answer: (d) frog
48. Factors present on surface of RBC related to heredity are
(a) blood groups
(b) antigens
(c) antibodies
(d) haemoglobin
Answer: (b) antigens
49. Pulmonary vein carries
(a) deoxygenated blood
(b) oxygenated blood
(c) mixed blood
(d) None of the above.
Answer: (b) oxygenated blood
50. In ventricular systole, oxygenated blood is pumped into
(a) Pulmonary artery and deoxygenated into artery
(b) Aorta and deoxygenated into pulmonary vein
(c) Pulmonary vein and deoxygenated into pulmonary artery
(d) Aorta and deoxygenated into pulmonary artery.
Answer: (d) Aorta and deoxygenated into pulmonary artery.