Cardiovascular System Quiz Multiple Choice: (2 points each) 1. What prevents blood from flowing backward in veins? a. Muscles b. Valves c. Cartilage d. Platelets 2. Blood cells are made a. In the heart b. From lymph c. From plasma d. In the bones 3. Blood from the lungs enters the heart at the a. Left ventricle b. Left atrium c. Right atrium d. Right ventricle 4. ____________ help you stay healthy by destroying pathogens a. red blood cells b. white blood cells c. plasma d. platelets 5. People with type _______ blood are universal recipients a. A b. B c. AB d. O 6. The leading cause of death in the United States is a. Atherosclerosis b. Hypertension c. Stroke d. Blood rejection 7. Physical activity causes as much as ______ times more blood to be sent to the muscles than when your body is at rest. a. 5 b. 10 c. 50 d. 100 8. Each __________ contains a protein called hemoglobin a. Platelet b. Red blood cell c. Vein d. White blood cell Fill in the blank: (3 points each) 9. Blood is carried away from the heart in ________________________. 10. Oxygen is delivered to the cells of the body by ____________________. 11. _____________ is the fluid part of blood. 12. ______________________ are the smallest blood vessels in your body. 13. The force exerted by blood on the inside walls of blood vessels is called ______ Short Answer: (4 points each) 14. Differentiate between systemic and pulmonary circulation 15. How are the structures of arteries and veins related to their functions? 16. Describe the functions of red blood cells, white blood cells and platelets. Short Essay: (6 points each) 17. A young woman is brought into the emergency room and needs a blood transfusion. Her blood type is AB. You call the blood bank to order AB blood, but you are told the bank is out of that type. What other type could the blood bank deliver for her transfusion? Explain your answer 18. Detail the flow of blood through the heart from the time it returns from the body until it flows back to the body.