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2 Marks Question

  1. Write two differences between systemic and pulmonary blood circulation.
  2. Two differences between systemic and pulmonary blood circulation is shown below in table:
    Systemic blood circulation Pulmonary blood circulation
    Systemic circulation is the circulation of blood from heart to different parts of body and vice-versa. Pulmonary circulation is the circulation of blood from heart to lungs and vice-versa.
    It occurs in the body to supply oxygenated blood to whole body through aorta. It occurs to purify the deoxygenated blood in lungs.
  3. Walls of auricles and ventricles are not of same thickness. Why?
  4. Auricle transfer blood up to ventricle for which less pressure is required. So, the walls of the auricle are thin. But ventricle transfer blood to the lungs and whole body for which more pressure is required. So, to withstand that pressure wall of the ventricle is thick.
  5. Write two differences between pulmonary artery and pulmonary vein.
  6. Two differences between pulmonary artery and pulmonary vein are shown below in table:
    Pulmonary artery Pulmonary vein
    It carry deoxygenated blood. It carry oxygenated blood.
    It carry blood from heart to lungs. It brings blood from lungs to heart.
  7. Write any two causes of increasing uric acid.
  8. Causes of increasing uric acid are listed below:
    1. Hypothyroidism, obesity, leukemia.
    2. High level of caffeine and alcohol consumption.
    3. Excessive consumption of meat products, pulses, beers, etc.
  9. Write any two symptoms of hemophilia disease.
  10. Any two symptoms of hemophilia disease are:
    1. No blood clots.
    2. Wounds do not heal quickly.
  11. Identify the blood vessel given and label the parts A, B, C and D. Blood vessel
  12. A = Endothelium
    B = Connective tissue
    C = Smooth muscle
    D = Valve
  13. Write any two differences between red blood cells and white blood cells.
  14. Two differences between red blood cells and white blood cells are shown below in table:
    Red blood cells (erythrocytes) White blood cells (leucocytes)
    They are small in size. They are large in size.
    They transport O2 and CO2 in the blood. They help in the defense of the body.
  15. Mention any two differences between artery and vein.
  16. Two differences between artery and vein are shown below in table:
    Artery Vein
    It carry blood away from heart. It bring blood toward heart.
    Its wall is thick and strong. Its wall is thin and collapsible.
  17. "Veins have valves" give reason.
  18. Veins have valves because to allow blood to flow in one direction only that is, towards heart.
  19. What happens if RBC count is low? Write any two functions of WBC.
  20. The absence of adequate number of RBCs in the blood causes anemia. In such condition, a person feels tired even after a short walk.
    Two functions of WBC are:
    1. It produces antibodies which help fight infections by attacking bacteria, viruses, and germs.
    2. Some removes the bacteria destroyed by itself and heal the wound.
  21. Mention the location of pulmonary and bicuspid valve inside the heart.
  22. Pulmonary valve lies between right ventricle and pulmonary artery. Similarly, bicuspid valve lies between left auricle and left ventricle.
  23. The wall of artery is thicker than vein, why?
  24. In artery blood flows at high speed and high pressure as it carry blood from heart to different body parts. But, blood flows at a much lower pressure in vein. Hence, to withstand the high pressure of blood the wall of artery is thicker than vein.
  25. The wall of left ventricle is thicker than the wall of right ventricle, why?
  26. The right ventricle has to pump for a short distance that is from heart to lungs. But the left ventricle has to pump blood up to a very long distance inside our body, for which a great pressure is required. Hence to prevent it from being ruptured the wall of left ventricle is thicker than the wall of right ventricle.
  27. State one function pf each of the following.
  28. Fibrinogen = It helps in clotting of blood at cuts.
    Capillaries = It connect the arteries and vein.
  29. Rupturing of an artery is dangerous, why?
  30. Artery carry blood from the heart to different body parts in high speed and at high pressure. Rupturing of it may lead to immediate death due to loss of blood in the body. So, rupturing of an artery is dangerous.
  31. Write a difference between pulmonary artery and pulmonary vein. "A person has a blood pressure of 120/80 mmHg", what is the meaning of this statement.
  32. The pulmonary artery carries deoxygenated blood while the pulmonary vein carries oxygenated blood. The blood pressure of a man is 120/80 mm of Hg means that his/her systolic pressure is 120 mm of Hg and diastolic pressure is 80 mm of Hg.
  33. A person suffering from anemia feels tired even in a short walk, why?
  34. Anemia is caused due to the absence of an adequate number of RBC in the blood which transport O2 and CO2 in the blood. So, a person suffering from anemia feels tired even in a short walk.
  35. What is meant by systolic blood pressure of a man is 130/90 mmHg? Write any three functions of plasma.
  36. Systolic blood pressure of a man is 130/90 mmHg means that when the ventricle contract blood pressure in the arteries is 130 mmHg.
    Three functions of plasma are:
    1. It regulates the amount of water in the blood.
    2. It transports hormones secreted by endocrine glands.
    3. It carries urea from liver to the kidneys for removal.
  37. What happens if the pericardial fluid decreases? Write the name of blood vessels which carry blood from lungs to heart.
  38. If the pericardial fluid decreases heart can be injured.

    The name of blood vessels which carry blood from lungs to heart is pulmonary artery.

  39. What happens when the amount of platelets increases and decreases?
  40. Excess of platelets in the blood cause thrombocytosis and its under production causes hemophilia.
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