Class XI

For a healthy individual, calculate stroke volume for him if other values are; heart beat per minute = 72 and cardiac output is 5 litre?
  1. 0.08
  2. 0.05
  3. 0.09
  4. 0.06
Which of the following statements doesn’t hold true for blood clotting cascade? i. Ruptured platelets release thromboplastin. ii. Prothrombinis converted into thrombin in the presence of vitamin K and Na+ions. iii. Fibrinogen is converted into fibrin through enzymatic action of thrombin in the presence of Ca++ions iv. Fibrin makes clot via process of polymerisation.
  1. all statements are wrong
  2. only statement ii) and iii) are wrong
  3. only statement i) and iv) are wrong
  4. only statement iv) is wrong
Sarla is on protein-deficient diet. As a result her plasma proteins content is reduced. She may develop symptom like :
  1. diabetes
  2. swellings of hands and feet
  3. high blood pressure
  4. reduced oxygen supply to tissues
Prothrombin plays crucial role in blood coagulation and vitamin K is considered essential for blood clotting, now read the following : i. Vitamin K is necessary for synthesis of prothrombin in liver. ii. Vitamin K is necessary for synthesis of prothrombin in bone marrow. iii. Vitamin K is necessary for conversion of prothrombin into active thrombin.
  1. both statement (ii) and (iii) are correct.
  2. only statement (i) is correct.
  3. only statement (ii) is correct.
  4. both statement (i) and (iii) are correct.
Read the following : i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.
  1. Statement ii) is correct and i) is wrong.
  2. Statement ii) is wrong and i) is correct.
  3. both are wrong
  4. both are correct
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