Blood Clotting

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  • 1/9 Questions

    What is the order of clotting?

    • Fibrin, fibrinogen, thrombin, prothrombin, thromboplastin
    • Prothrombin, thromboplastin, thrombin, fibrin, fibrinogen
    • Thromboplastin, thrombin, prothrombin, fibrin, fibrinogen
    • Thromboplastin, prothrombin, thrombin, fibrinogen, fibrin
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About This Quiz

HUMAN BIOLOGY AS
A quiz on blood clotting and clotting factors.

Blood Clotting - Quiz

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  • 2. 

    Thrombin is an active _______.

    Explanation
    Thrombin is an active enzyme. Enzymes are proteins that act as catalysts in biological reactions, speeding up the conversion of one molecule into another. Thrombin is a key enzyme in the clotting cascade, where it converts fibrinogen into fibrin, leading to the formation of blood clots. It plays a crucial role in hemostasis, preventing excessive bleeding. Therefore, the correct answer is enzyme.

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  • 3. 

    The fibrin fibres pile up in tangles that form a mesh over the wound. Blood cells become trapped in the mesh, forming a _____ ____.

    Explanation
    When a wound occurs, fibrin fibres form a mesh over the wound. This mesh traps blood cells, resulting in the formation of a blood clot. A blood clot is a gel-like mass that helps to stop bleeding by sealing the wound and promoting the healing process.

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  • 4. 

    _______ also break down and release thromboplastin.

    Explanation
    Platelets are small cell fragments found in the blood that play a crucial role in blood clotting. When blood vessels are damaged, platelets are activated and adhere to the site of injury. They release substances, including thromboplastin, which is a key component in the clotting process. Thromboplastin helps convert prothrombin to thrombin, which then converts fibrinogen to fibrin, forming a clot to prevent excessive bleeding. Therefore, platelets not only help in forming clots but also release thromboplastin, making them the correct answer.

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  • 5. 

    The exposed tissues just below the endothelium, release an enzyme called _______.

    Explanation
    The exposed tissues just below the endothelium release an enzyme called thromboplastin. Thromboplastin is an essential enzyme in the blood clotting process. When tissues are damaged, thromboplastin is released, initiating a cascade of reactions that ultimately leads to the formation of a blood clot. This clotting mechanism is crucial for preventing excessive bleeding and promoting wound healing.

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  • 6. 

    These smaller units then join together (polymerise) to form long, _____ fibres of the protein _____.

    Explanation
    When smaller units of protein join together through a process called polymerization, they form long, insoluble fibres known as fibrin. Fibrin is a key component of blood clotting and plays a crucial role in forming a mesh-like structure to stop bleeding. These fibres are insoluble, meaning they do not dissolve in water, which allows them to form stable blood clots and promote wound healing.

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  • 7. 

    Thrombin then ______ a large, soluble plasma protein called ______ into smaller units.

    Explanation
    Thrombin is an enzyme that plays a crucial role in blood clotting. It acts on fibrinogen, a soluble plasma protein, by hydrolyzing it. This hydrolysis process breaks down fibrinogen into smaller units, which are then able to form a fibrin meshwork. This fibrin meshwork is essential for the formation of blood clots, as it helps to trap platelets and other blood cells, ultimately leading to the formation of a stable clot. Therefore, thrombin's ability to hydrolyze fibrinogen is important for the clotting process.

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  • 8. 

    _____ and ______ _ are both co-factors that are needed for blood clotting

    Explanation
    Calcium and vitamin K are both co-factors that are necessary for blood clotting. Calcium plays a crucial role in the formation of blood clots by helping to activate certain proteins involved in the clotting process. On the other hand, vitamin K is essential for the synthesis of these clotting proteins. Therefore, both calcium and vitamin K are required for effective blood clotting to occur.

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  • 9. 

    Thromboplastin then _______ the conversion of an inactive plasma protein, prothrombin, into ________.

    Explanation
    Thromboplastin is an enzyme that initiates the conversion of prothrombin, an inactive plasma protein, into thrombin. Thrombin is a key enzyme in the blood clotting process, as it converts fibrinogen into fibrin, which forms a mesh-like structure to create a blood clot. Therefore, thromboplastin catalyzes the formation of thrombin, which is essential for blood clotting.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 28, 2011
    Quiz Created by
    Nuzzzzie
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