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Biologia : Sistema Circulatório



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1.

Contraction of ventricles is known as diastole.

  False

  True

2.

Which of these is not true regarding hemoglobin?

  It carries oxygen.

  Its deficiency leads to anemia.

  Percentage of hemoglobin in a healthy young man is 10 – 12 gm%.

  It is found in RBCs.

3.

Bleeding time is prolonged in hemophilia.

  True

  False

4.

Which of the following is true?

  Platelets contain an ill-defined nucleus.

  Platelets contain single nucleus.

  Platelets do not contain nucleus.

  Platelets contain many nuclei.

Dica      

5.

Which of these is not a feature of veins?

  They are thin-walled.

  All veins carry deoxygenated blood.

  They return blood from the various parts of the body to the heart.

  They contain valves.

Dica      


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