Problem Sheet 4- Blood Clotting

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Across
  1. 4. The process in which blood is prevented from leaking out of damaged blood vessels
  2. 5. Platelets that prevent leaks from damaged blood cells
  3. 6. Where are red blood cells produced
  4. 8. The positive feedback of one factor, produces another factor, in a cascade effect until eventually there is a large quantity of what substance on the aggregated plates surfaces?
  5. 11. Production of platelets is known as
  6. 13. Production of blood cells
  7. 16. Red blood cells lack this
  8. 17. White blood cells
  9. 18. After being released from bone marrow, platelets remain in which blood until they are removed by macrophages?
  10. 20. Platelets contain which chemical element that is also essential for clotting
Down
  1. 1. When platelets are gathered at the site of the injury they change shape and develop ____________ so they can intertwine with one another.
  2. 2. Platelets are pieces of cytoplasm from what kind of cell in the bone marrow
  3. 3. Red blood cells that carry oxygen from the lungs to the cells and tissues of the body
  4. 7. Which substance forms net-like strands around and through the platelets at the site of an injury to clot?
  5. 9. Blood clots when which soluble plasma protein is converted into fibrin?
  6. 10. How many different factors are necessary for clotting to take place?
  7. 12. factors Platelets that are intertwined together at the site of injury release what to assist in the clotting process?
  8. 14. Platelets attach here to release endothelial growth factor into endothelial cells.
  9. 15. True or false? At the same time the clot is formed, there is other processes ensuring that the clot remains at the site of the injury?
  10. 19. A major characteristic of platelets that allows it to stick to blood vessel walls and other platelets