Class XI

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
The mass of tissue seen in the left corner of the right atrium close to the atri-ventricular septum is
  1. Bundle of His
  2. SAN
  3. Purkinje fibres
  4. AVN
Blood enters glomerular capillaries through _____ arteriole and leaves through _____ arteriole
  1. radial, collecting
  2. distributing, collecting
  3. afferent, efferent
  4. efferent, afferent
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
The cardiovascular centre is located in :
  1. Pons
  2. Medulla oblongata
  3. Cerebrum
  4. Cerebellum
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