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Body Fluids and Circulation Test - 30

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Body Fluids and Circulation Test - 30
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  • Question 1
    1 / -0
    The blood component essential for blood coagulation is
    Solution
    Coagulation or clotting is a process where the blood in liquid form turns into a gel. The mechanism involves activation, adhesion and aggregation of platelets and deposition of fibrinogen. Though this is an inactive clotting factor, it helps to clot by the formation of insoluble fibrin.
    Therefore, the correct answer is option C.
  • Question 2
    1 / -0
    Which of the following cells are involved in the defensive mechanism?
    Solution
    a) Neutrophils are phagocytic leukocytes that engulf pathogens which are destroyed by the granules in them.
    b) Lymphocytes are white blood that are concentrated in central lymphoid organs and tissues. There are two types of lymphocytes, B lymphocytes and T lymphocytes. T lymphocytes play a role in cell-mediated immunity and B lymphocytes are involved in humoral immune response.
    c) Macrophages are made from white blood cells called monocytes and engulf the dead cells. All the three play a role in immunity.  
    So, the correct answer is option D.
  • Question 3
    1 / -0
    The solid part of blood is
    Solution
    Blood is living tissue which is made up of liquid and solids. The liquid part, called as plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets. Red blood cells deliver oxygen from your lungs to your tissues and organs. White blood cells fight infection and are part of your body's defense system. Platelets help blood to clot when you have a cut or wound. Bone marrow, the spongy material inside your bones, makes new blood cells. Blood cells constantly die and your body makes new ones. Red blood cells live about 120 days, and platelets live about 6 days. Some white blood cells live less than a day, but others live much longer. 
    Therefore, the correct answer is option D.
  • Question 4
    1 / -0
    Mineral essential for the coagulation of blood is
    Solution
    All the reactions which happen during the clotting process require calcium ions for their occurrence. Calcium works together with vitamin K and a protein called as fibrinogen in the clotting cascade. Without adequate levels of calcium and vitamin K, blood will take longer to clot and if both nutrients are missing it could be fatal. Therefore, the correct answer is option C.
  • Question 5
    1 / -0
    Haemophilia is a condition where there is 
    Solution
    • Haemophilia is a group of hereditary genetic disorders in which the body's blood clotting ability fails to stop bleeding if any cut happens.
    • Thus, it is also known as bleeder's disease. One type of haemophilia called haemophilia A happens due to the deficiency of blood clotting factor VIII. 
    Therefore, the correct answer is option A.
  • Question 6
    1 / -0
    The connective tissue known as middleman is
    Solution
    Lymph fills the spaces between tissues, between the cells of organs and between cells and connective tissues. Tissue fluid serves as the "middleman" for the exchange between blood and body cells. The lymphatic system collects tissue fluid, and as lymph, the collected fluid combines with the blood to maintain its volume. So, the correct answer is option A.
  • Question 7
    1 / -0
    Which of the following is an oxygen carrier?
    Solution
    RBCs contain pigment hemoglobin which helps in the transport of oxygen to body cells. Thus, RBCs are oxygen carriers. Option A is correct.
  • Question 8
    1 / -0
    Coagulation of blood in vessels is prevented during normal circulation by
    Solution
    Heparin is a natural anticoagulant of the body produced in the liver. It is normally found circulating through the bloodstream. It prevents the blood clotting in veins and arteries during normal circulation.
    Thus, the correct answer is option A.
  • Question 9
    1 / -0
    Both erythrocytes and leucocytes are formed in the   
    Solution
    In humans, blood cells are formed in the bone marrow of long bones such as legs, arms, ribs, sternum and vertebrae. The formation of blood cells is known as hematopoiesis which takes place in the bone marrow.
    Therefore, the correct answer is option A.
  • Question 10
    1 / -0
    When the right ventricle of heart contracts, the blood first goes to   
    Solution
    The right ventricle receives the deoxygenated blood from the right auricle which is further pumped by the right ventricle to the lungs for oxygenation. As deoxygenated blood flows into the right atrium, it passes through the tricuspid valve and into the right ventricle, which pumps the blood up through the pulmonary valve and through the pulmonary artery to the lungs. 
    So, the correct answer is option B.
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