Circulatory System Class X Past Paper PDF

# Previous Years' Examination Questions ## 1 Mark Questions 1. The protective covering of the heart. 2. State the exact location of the tricuspid valve. 3. Pulse wave is mainly caused by the * systole of atria * diastole of atria * systole of the left ventricle * systol...

# Previous Years' Examination Questions ## 1 Mark Questions 1. The protective covering of the heart. 2. State the exact location of the tricuspid valve. 3. Pulse wave is mainly caused by the * systole of atria * diastole of atria * systole of the left ventricle * systole of the right ventricle 4. Differentiate between the following pair on the basis of what is given in the bracket? * Bicuspid valve and tricuspid valve. (function) * The wall of the ventricle is thicker than the auricles. 5. Give biological reasons for the following 6. State the correct location of pulmonary semilunar valve. 7. Name the phase of cardiac cycle in which the auricles contract. 8. Briefly explain the pulse. 9. Give the exact location of the mitral valve. 10. State the main function of coronary artery. 11. **Rewrite the complete the following sentence by inserting the correct word in the space indicated. The blood vessel that begins and ends in capillaries is the _______.** 12. Differentiate between the following pair according to what is given in the bracket. * Beginning of the ventricular systole and the end of ventricular diastole. (type of heart sound) 13. Given below is a group of five terms, arrange and rewrite the terms in the correct order so, as to be in a logical sequence. * Aorta, hepatic vein, hepatic portal veins, stomach, liver. 14. Name the phase of the cardiac cycle in which the ventricles relax. 15. Choose the odd one out from each of the following sets, giving the reason for your choice. * Mitral valve, sino-atrial node, aorta, pulmonary vein. 16. Give the exact location and one function of chordae tendinae. 17. Give biological reasons for the blood in the arteries flows in spurts. 18. Given below is set of terms, arrange and rewrite the terms so as to be in logical sequence. * Right auricle, pulmonary vein, post and pre-vena cava, lungs, right ventricle, pulmonary artery, left auricle. 19. Give one point different between the following pair on the basis of what is indicated in bracket? * Pleura and pericardium. (location) 20. Give one point difference between the following pair on the basis of what is indicated in bracket? * Bicuspid valve and tricuspid valve. (place where it is present) 21. State whether the following statements are true or false. Correct and rewrite the false statements either the first word or the last word only. * 'Dup' is the first heart sound. 22. Name the blood vessel which carries oxygenated blood to the liver. 23. Name the phase of contraction of the chambers of the heart. 24. Name the valve present in between the chambers of the right side of the human heart. 25. Give one point difference between the following pair on the basis of what is indicated in bracket? * Artery and vein. (type of blood flowing through) 26. Name the phase of the cardiac cycle in which the auricles contract. 27. Why are veins provided with valves? 28. Complete the following statement by filling in the blank with the appropriate word from the choices given the bracket. You must rewrite the complete statement. * The pulse beat per minute of a normal human adult is..... (72, 82, 78.) 29. From where to where do the following blood vessels carry blood? * Hepatic vein * Hepatic portal vein ## 2 Marks Question ## Diagram Based Questions (5 Marks Each) 30. The diagram alongside represents the simplified pathway of the circulation of blood. Study the same and answer the questions that follow. * Name the blood vessels labelled A and B. * State the function of blood vessels labelled E and H. * What is the importance of the blood vessel labelled F? * Which blood vessel will contain a high amount of glucose and amino acids after a meal? 31. The diagram given alongside represents the human heart in one phase of its functional activities. Study the same and answer the questions that follow. * Name the phase. * Label the parts A, B and C. * Which part of the heart is contracting in this phase? Give a reason to support your answer. * Draw well labelled diagrams of part A and B to show the structural differences between them. 32. The diagram given alongside show the cross-section of two kinds of blood vessels. * Identify the blood vessels a and b. In each case give a reason to support your answer. * Name the parts numbered A and B. * When are the sound 'Lubb' and 'Dubb' produced during a heartbeat? ## Circulatory System 33. The diagram alongside represents circulation in the human body. Answer the questions that follow. * Name the blood vessels labelled A, C, Fand G. * Name the blood vessel that supplies the walls of the heart with oxygen. * Draw a neat labelled diagram of the blood vessel numbered 'B' as seen in a cross-section. * Mention one structural difference between blood vessels numbered D and E. 34. Given alongside is a schematic representation of the circulatory system in man. Study the same and answer the questions that follow. * Label the parts A to D indicated in the diagram. * Give one difference between the parts A and B based on * their structure * the nature of blood flowing through them. * What is the specific name of the type of blood circulation that takes place between the heart and the lungs? * Name the valve found at the beginning of the part labelled C. 35. Given alongside is a diagrammatic representation of a certain part of the process of circulation of blood in man. Study the same and then answer the questions that follow. * Name the parts labelled A, B, D and F. * Give the number and name of vessel which contains the maximum amount of urea a few hours after a protein rich meal. * Mention two structural difference between blood vessels 'C' and 'H'. 36. The diagram alongside represents a certain category of blood vessels showing the role of a special structure in their walls. * Name the kind of blood vessels shown. * Name the structure shown inside the blood vessels. * Describe the role of these structures. * Are these structures present in any other kind of blood vessel? If so, name it. * Towards which side of the figure (top or bottom) is the heart located? 37. The following diagram represents the human heart in one phase of its activity. Study the same then answer the questions that follow. * Name the phase. Give a reason to support your answer. * Which parts of the heart are contracting in this phase? * Name the parts numbered from A to F. * What type of blood flows through the parts marked 'A' and 'B'? * How many valves are closed in this phase? 38. Given alongside is a simple diagram of the circulation of blood in a mammal showing the main blood vessels, the heart, lungs and body tissues. The blood vessel labelled Fcontains deoxygenated blood and the valve leading to it has three semi-lunar pockets. * Name the blood vessels or organs marked by numbers A to H. * What do you mean by 'double circulation' of blood in mammals? * What is diastole? ## Answers 1. Pericardium is the protective covering of the heart. 2. Tricuspid valve is found between the right auricle and right ventricle. 3. Pulse wave is mainly caused by the systole of the left ventricle. 4. The difference between bicuspid valve and tricuspid valve are given below. | Bicuspid Valve | Tricuspid Valve | | --- | --- | | It closes the opening of auriculo-ventricular valves when blood rushes from left auricle into left ventricle. | It closes the opening of auriculo-ventricular valves when blood rushes from right atrium to right ventricle.| 5. Ventricles have thicker walls than auricles because they are meant to pump blood with pressure to reach blood to larger distances. 6. Pulmonary semilunar valves is located at the base of the pulmonary trunk. 7. Auricular systole is the phase of cardiac cycle in which auricles contract. 8. Pulse is a wave pressure of blood passing through the arteries as it is pumped out of the heart. 9. Mitral valve is found between the left auricle and left ventricle. 10. Coronary artery supplies oxygenated blood to the walls of the heart. 11. The blood vessel that begins and ends in capillaries is the hepatic portal system. 12. Heart sound produced at the beginning of the ventricular sytole is called Lubb and at the other end of ventricular systole is called Dubb. 13. The logical sequence is Aorta → stomach → hepatic portal vein → liver → hepatic vein. 14. Ventricular diastole is the phase of cardiac cycle in which the ventricles relax. 15. Odd one (Sino-Atrial node), it is the structure present in the right side of the heart and rest of all other are found in the left side of the heart. 16. * Location Chordae tendinae is found at right ventricle. * Function Its main function is to keep the cuspid valves in position. 17. Blood in artery flows in spurts because flow of blood is under pressure and also because arteries have elastic walls. 18. The logical sequence is Post and pre vena cava → Right auricle → Right ventricle → Pulmonary artery→ Lungs → Pulmonary vein → Left auricle. 19. * Pleura It lines each lung and the wall of the chest cavity. * Pericardium It surrounds the heart and the proximal ends of the aorta, vena cava and the pulmonary artery. 20. * Bicuspid It is located at the aperture between the left auricle and left ventricle. * Tricuspid It is located at the aperture between the right auricle and right ventricle. 21. The statement is false. Lubb is the first heart sound produced. 22. Hepatic artery is the blood vessel which carries oxygenated blood to liver. 23. Systole is the phase of contraction of chambers of the heart. 24. Refer to ans. 2 25. Arteries carry oxygenated blood, while veins carry deoxygenated blood. 26. Refer to ans. 23 27. Veins are provided with valves because the blood in them flow at low pressure and these prevent the back flow of blood. 28. The pulse beat of a normal human adult is 72 beat/min. 29. * Hepatic vein carries blood from liver to posterior vena cava. * Hepatic portal vein carries blood from intestine to liver. 30. * Bood vessels labelled as A and Bare A-Vein B-Artery * Function of different blood vessels labelled as E is to regulates quantity of nutrient flowing in blood and H carry the blood from liver to heart. * Blood vessel Fis called hepatic portal vein. It carries deoxygenated blood from intestine to liver. This blood contains excess glucose, some toxic substances, etc. which are sent to liver where they are detoxified and the excess glucose is converted to glycogen and stored. This prevents these substances from directly entering the heart and damaging the vital organs including heart. * Blood vessel F will contain high amount of glucose and amino acid after a meal. 31. * The phase is atrial systole. * The parts A, Band Cin the given figure are labelled as A- Pulmonary artery B- Superior vena cava. C-Aorta * Upper chambers, ie, both the atría are contracting in this phase because blood is flowing downwards (towards the ventricles). * Refer to fig. on page 410 (artery and vein). 32. * Blood vessels labelled as A is artery because it has narrow lumen and thick muscular wall and B is Vein because it has wide lumen and thin muscular wall. * The parts labelled A and B in the diagram are endothelium and lumen respectively. * 'Lubb' sound is produced when tricuspid and mitral valves get closed, while 'Dubb' sound is produced when pulmonary and aortic semilunar valves get closed. * 1. Blood vessels that begins and ends in capillaries is 'hepatic portal vein'. 2. Blood vessel that supplies blood to the walls of the heart is 'coronary artery'. 33. * Blood vessels labelled as A, C, Fand G are A Pulmonary artery C Hepatic portal vein F Hepatic vein G Posterior vena cava. * The bood vessels that supplies the walls of the heart with O2 is coronary artery. * Blood vessel labelled as 'B' is vein. Refer to fig. on page 67. * Structural difference between blood vessels numbered D (renal artery) and E (renal vein) is D (Renal artery) Has thick muscular wall with narrow lumen. E (Renal vein) Has thin muscular wall with wide lumen. 34. * Parts labelled as A to D in the diagram are A Right auricle B Left ventricle C Aorta D Body organ. * Difference between the parts A and B are | Part-4 (Right auricle) | Part-B (Left ventricle) | |---|---| | Thin muscular walls. | Thick muscular walls. | | Carries deoxygenated blood. | Carries oxygenated blood. | * The specific name of the type of blood circulation takes place between heart and lung is double circulation. * Valve found at the beginning of part labelled as C is aortic semilunar valves. 35. * The parts labelled as A, B, D and Fare A Pulmonary artery B - Pulmonary vein D- Renal artery F Hepatic artery * Based vessel E named as hepatic vein will contain the maximum amount of urea few hours after the protein rich meal. * Two structural difference between blood vessels Cand Hare | Blood vessel C (Aorta) | Blood vessels H (Vena cava) | |---|---| | Lumen is small. Valves absent. | Lumen is large. Valves present. | 36. * The blood vessel shown in the figure is vein. * The structure inside the blood vessels are valves. * Valves are presents to prevent the back-flow of blood in veins. * Yes, these are also present in the heart at the openings of aorta and pulmonary artery. * The heart is located towards the top side of the figure. 37. * The phase shown in figure is venticular systole. * The lower part consisting of the right and left ventricles are contracting in this phase as the blood is seem to be flowing into the pulmonary artery and main aorta, while the bicuspid and tricuspid valves are closed. * The parts numbered from A to Eare A - Pulmonary artery B Main aorta, C- Pulmonary vein D- Left auricle E - Bicuspid valve F - Right ventricle. * In part A (pulmonary artery) deoxygenated blood from heart is flowing to the lungs for oxygenation In part B (pulmonary vein) carries oxygenated blood from the lung is flowing to the left auricle. * Two valves i.e. the bicuspid and tricuspid valves leading from the auricle to the ventricles are closed during systole to prevent the back-flow of blood into the auricles. 38. * Blood vessels or organs marked from number A to Hare A - Body tissues B Vena cava C - Aorta D - Right ventricle E- Ventricle F - Pulmonary artery G - Pulmonary vein H - Lung * For one complete circulation, blood has to pass from the heart through two separate pathways, i.e. systematic circulation and pulmonary circulation. This type of circulation is called double circulation. * The relaxation phase of auricles is known as diastole. Scanned with OKEN Scanner ==End of OCR for page 6==