(Circulation in Animals – Paper 06), Total Questions: 20, Subject: Biology, Topic: Circulation in Animals, Question Type: MCQs
| Sr. No. | Questions | Answers |
| 1. | The role of pacemaker in heart is to (a) initiate heart beat (b) control blood pressure (c) control atherosclerosis (d) purify blood |
Answer: (a) |
| 2. | The sequence of cardiac cycle is (a) Atrial systole – Ventricular systole – Joint diastole (b) Diastole – Atrial systole – Ventricular diastole (c) Atrial systole – Ventricular diastole – Ventricular diastole (d) Ventricular diastole – Diastole – Ventricular systole – Atrial systole |
Answer: (a) |
| 3. | Thickest part of human heart is (a) Right atrium (b) left atrium (c) Right ventricle (d) left ventricle |
Answer: (d) |
| 4. | Thromboplastin required for blood clotting at the place of injury is released by (a) blood platelets (b) eosinophils (c) neutrophils (d)lymphocytes |
Answer: (a) |
| 5. | Tricuspid valve is present between (a) left atrium and left ventricle (b) right and left atria (c) right and left ventricles (d) right atrium and right ventricle |
Answer: (d) |
| 6. | Trombocytes have a life of (a) 3-4 weeks (b) 4-5 weeks (c) 3-4 days (d) None of the above |
Answer: (c) |
| 7. | Typical ‘lubb-dup’ sounds heard in heart beat are due to (a)Closing of bicuspid and tricuspid valves (b) closing of semilunar valves (c) Blood under pressure through aorta (d) Closure of bicuspid-tricuspid valves followed by semilunar valves |
Answer: (d) |
| 8. | Value of cardiac output is (a) Auricular volume × ventricular volume (b) Stroke volume × Rate of heart beat (c) Blood pumped in one minute (d) Both B and C |
Answer: (d) |
| 9. | Valve present over left auriculo-ventricular opening is (a) Semilunar valve (b) Tricuspid valve (c) Valve of Thebesius (d) Bicuspid valve |
Answer: (d) |
| 10. | Valve surrounding opening of coronary sinus is (a) Thebesius valve (b) Eustachian valve (c) Mitral valve (d) Semilunar valve |
Answer: (a) |
| 11. | Valves which allow blood from ventricles into arteries and not in opposite direction are (a) Aortic valve and mitral valve (b) AV valves and semilunar valves (c) Bicuspid and tricuspid valves (d) Semilunar valves and tricuspid |
Answer: (b) |
| 12. | Valves occur in (a) arteries, veins and auricles (b) Atria, ventricles and veins (c) Arteries, veins and ventricles (d) SA node, AV node and veins |
Answer: (b) |
| 13. | Wall of blood capillary is formed of (a) Haemocytes (b) Parietal cells (c) Endothelial cells (d) Oxyntic cells |
Answer: (c) |
| 14. | What is true (a) All arteries carry oxygenated blood (b) All veins carry oxygenated blood (c) All veins carry oxygenated blood except one (d) All arteries carry oxygenated blood except one |
Answer: (d) |
| 15. | What is true about vein? (a) All veins carry deoxygenated blood (b) All veins carry oxygenated blood (c) They carry blood from organs towards heart (d) They carry blood from heart towards organs |
Answer: (c) |
| 16. | Which has the thickest wall? (a) Right auricle (b) Right ventricle (c) Left auricle (d) Left ventricle |
Answer: (d) |
| 17. | Which has the thickest walls ? (a)Left ventricle (b) Right ventricle (c) Left auricle (d) Right auricle |
Answer: (a) |
| 18. | Which is correct about leucocytes (a) They are red coloured (b) They can cross capillaries (c) They are enucleate (d) Decrease in their number causes Leukemia |
Answer: (b) |
| 19. | Which is false? (a) RBCs are also called leucocytes (b) White blood corpuscles are part of body`s defence mechanism (c) Platelets are also called thrombocytes (d) Oxygen is carried in blood after combining with haemoglobin |
Answer: (a) |
| 20. | Which is the phagocytic structure of blood ? (a) Eosinophil (b) Basophil (c) Platelet (d) Monocyte |
Answer: (d) |