Human Anatomy & Physiology: All About Blood 4

41 Questions | Total Attempts: 115

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Human Anatomy & Physiology: All About Blood 4

I created these quizzes to help me study for my A&P exams. This quiz deals with blood platelets and clotting.


Questions and Answers
  • 1. 
    These are tiny fragments of membrane enclosed cytoplasm that are pinched off from giant cells in the bone marrow.
    • A. 

      Erythrocytes

    • B. 

      Lymphocytes

    • C. 

      Monocytes

    • D. 

      Megakaryocytes

    • E. 

      Thrombocytes

  • 2. 
    The main function of platelets is _____________. One way they do this is by helping to close breaks in blood vessels by sticking to the broken surfaces and they clump together.
  • 3. 
    These are the giant cells located in the bone marrow from which platelets derive.
    • A. 

      Erythrocytes

    • B. 

      Lymphocytes

    • C. 

      Monocytes

    • D. 

      Megakaryocytes

    • E. 

      Thrombocytes

  • 4. 
    Platelets release _________ which causes the smooth muscles in the walls of the blood vessels to contract which would decrease blood loss.
    • A. 

      Fibrinogen

    • B. 

      Glycogen

    • C. 

      Seratonin

    • D. 

      Erythropoietin

    • E. 

      Heparin

  • 5. 
    When the smooth muscles in the walls of the blood vessels contract which leads to a decrease in blood loss, it is better known as what?
  • 6. 
    How long (approximately) is the life span of a platelet
    • A. 

      20 days

    • B. 

      5 days

    • C. 

      12 days

    • D. 

      10 days

    • E. 

      8 days

  • 7. 
    What is the fluid portion of clotted blood called?
  • 8. 
    What are the proteins involved with clotting called?
    • A. 

      Fibrinogen

    • B. 

      Serum

    • C. 

      Glycogen

    • D. 

      Heparin

    • E. 

      Seratonin

  • 9. 
    _______ refers to the stoppage of bleeding. These mechanisms are most effective in controlling blood loss from _____________.
  • 10. 
    The next few questions deal with Hemostasis. Put the occurances in their correct sequence.Step 1 of Hemostasis
    • A. 

      A platelet plug forms

    • B. 

      An arteriole or venule is severed

    • C. 

      The blood vessel spasms

    • D. 

      Platelets release seratonin

  • 11. 
     Step 2 of Hemostasis:
    • A. 

      A platelet plug forms

    • B. 

      An arteriole or venule is severed

    • C. 

      The blood vessel spasms

    • D. 

      Platelets release seratonin

  • 12. 
    Step 3 of Hemostasis:
    • A. 

      A platelet plug forms

    • B. 

      An arteriole or venule is severed

    • C. 

      The blood vessel spasms

    • D. 

      Platelets release seratonin

  • 13. 
    Step 4 of Hemostasis
    • A. 

      A platelet plug forms

    • B. 

      An arteriole or venule is severed

    • C. 

      The blood vessel spasms

    • D. 

      Platelets release seratonin

  • 14. 
    ______________ occurs when platelets adhere to the rough surfaces of the injury and to the exposed collagen in the CT that underlies the endothelial lining of blood vessels.
  • 15. 
    When platelets contact _______ their shapes change drastically. Numerous spiny processes begin to protrude from their membranes.
  • 16. 
    ________ refers to platelets adhering to platelets. The platelets stick to each other at the sites of injury.
    • A. 

      Agglutination

    • B. 

      Coagulation

    • C. 

      Clotting

    • D. 

      Aggregation

    • E. 

      Hemostasis

  • 17. 
    _________ is the most effective means of hemostasis and it causes the formation of a blood clot by a series of reactions. Each one of these reactions activates the next in a chain reaction or cascade.
    • A. 

      Aggregation

    • B. 

      Agglutination

    • C. 

      Coagulation

    • D. 

      Platelet plug formation

  • 18. 
    A _________ is a gel consisting of insoluble fibers and trapped blood cells and platelets.
  • 19. 
    _______ is necessary for the function of some clotting factors.
    • A. 

      Vitamin C

    • B. 

      Folic Acid

    • C. 

      Vitamin B12

    • D. 

      Iron

    • E. 

      Vitamin K

  • 20. 
    One type of biochemical that is involved with clotting is a __________. They promote coagulation and include fibrinogen and prothombin.
  • 21. 
    Another type of biochemical that is involved with clotting is an __________. They inhibit coagulation
  • 22. 
    The basic event of coagulation is the conversion of soluble plasma protein _________ (aka _________) into insoluble threads of the protein _________.
  • 23. 
    An ___________ is triggered when blood contacts damaged blood vessel walls or tissues outside blood vessels. Damaged tissue release _______________ and this initiates a series of reactions involving several clotting factors.
  • 24. 
    __________ is associated with disrupted cell membranes and is not normally found in the blood. It is a source of __________ that provides a surface for the interaction or reaction of various clotting factors.
  • 25. 
    The next several questions will deal with clotting factors in an extrinsic clotting mechanism. Put the first 5 in the correct sequence.Step 1
    • A. 

      Factor X is activated

    • B. 

      Factor V is activated

    • C. 

      Damaged tissue releases tissue thromboplastin (Factor III)

    • D. 

      Production of the prothombin activator

    • E. 

      Factor VII is activated which in turn becomes factor VIIa

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