1) A pacemaker is a group of cells in one of the chamber of heart. The chamber is a. right ventricle b. left ventricle c. right atrium d. left atrium
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2) Atria and ventricles are connected by a a. vein b. artery c. capillary d. valve
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3) Small cells that make a net on a wound are a. white blood cells b. platelets c. red blood cells d. antigens
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4) The medium for blood cells to flow is a. tissue fluid b. plasma c. hemoglobin d. fibrinogen
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5) The beat inside the chest (under left rib) is due to a. huge blood vessels b. heart c. lungs d. bones
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6) When ventricles contract, atria a. relaxes b. also contracts c. squeezes d. blocks
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7) The heart locates a bit on the left side of the chest because a. it is on the left side b. the atria are tilted towards the left c. the ventricles are tilted towards the left d. the atria are tilted towards the right
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8) If a person's wound does not cure or clot is not formed, he is suffering from a. hemophilia b. anemia c. thrombosis d. varicose veins
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9) The number of chambers in a human heart is a. three b. four c. five d. six
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10) The disease in which deficiency of insulin occurs is known as a. diabetes b. cholesterol infection c. insulation d. glaciation
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