Drugs affecting blood Coagulation Quiz
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Questions and Answers

What is the main cause of clot formation within the blood vessels or the heart?

  • Platelet activation and aggregation (correct)
  • Production of fibrin
  • Formation of Thrombin
  • Blood Coagulation

Which type of clot adheres to a vessel wall?

  • Thrombin
  • Thrombus (correct)
  • Embolus
  • Fibrin

What is the main function of fibrin in the clot formation process?

  • Activating platelets
  • Preventing platelet activation
  • Cross-linking and stabilizing the clot (correct)
  • Dissolving the clot

Why are both thrombi and emboli considered dangerous?

<p>They may occlude blood vessels (D)</p> Signup and view all the answers

What is the role of platelets in response to vascular trauma?

<p>Adhesion to the site of injury, release of intracellular contents, and aggregation (C)</p> Signup and view all the answers

What is the first step in the response of platelets to vascular trauma?

<p>Adhesion to the site of injury (C)</p> Signup and view all the answers

What happens during the second step of platelet response to vascular trauma?

<p>Release of intracellular contents (C)</p> Signup and view all the answers

What is the final step in the response of platelets to vascular trauma?

<p>Aggregation (D)</p> Signup and view all the answers

What is the role of thrombin in the coagulation cascade?

<p>Conversion of fibrinogen to fibrin (A)</p> Signup and view all the answers

Which factor catalyzes the conversion of fibrinogen to fibrin in clot formation?

<p>Thrombin (C)</p> Signup and view all the answers

What is the result of the coagulation cascade in the formation of the clot?

<p>Conversion of fibrinogen to fibrin (D)</p> Signup and view all the answers

What is the primary function of factor Xa in the coagulation cascade?

<p>Activation of prothrombin (D)</p> Signup and view all the answers

Which of the following is NOT a mechanism by which endothelial cells maintain a nonthrombogenic lining in blood vessels?

<p>The release of plasminogen activators (A)</p> Signup and view all the answers

What is the role of Heparin like proteoglycans in the prevention of thrombosis?

<p>They inhibit coagulation (D)</p> Signup and view all the answers

Which phenomenon is important in preventing the adhesion of circulating platelets to the blood vessel lining?

<p>The maintenance of transmural negative electrical charge (D)</p> Signup and view all the answers

What activates the fibrinolytic pathway to prevent thrombosis?

<p>The production of plasminogen activators (A)</p> Signup and view all the answers

What is the primary function of platelet aggregation inhibitors?

<p>Blocking GPIIb,IIIa receptors (D)</p> Signup and view all the answers

How do antiplatelet drugs contribute to thrombolytic therapy?

<p>By maintaining perfusion and limiting infarction size (C)</p> Signup and view all the answers

What is the role of heparin when administered as an adjunct to antiplatelet therapy?

<p>Serving as a potent anticoagulant (B)</p> Signup and view all the answers

Which signals do platelet aggregation inhibitors interfere with?

<p>Signals promoting platelet aggregation (C)</p> Signup and view all the answers

What is the mechanism of action of aspirin in low doses?

<p>Inhibiting thromboxane synthesis in platelets (D)</p> Signup and view all the answers

What is a therapeutic use of aspirin according to the text?

<p>Prophylactic treatment of transient cerebral ischemia (C)</p> Signup and view all the answers

Which adverse effect is associated with aspirin therapy?

<p>Gastrointestinal ulceration (A)</p> Signup and view all the answers

What is the goal of therapy with aspirin according to the text?

<p>To inhibit the synthesis of platelet thromboxane A2 (C)</p> Signup and view all the answers

What is the most serious side effect associated with the use of ticlopidine?

<p>Neutropenia (A)</p> Signup and view all the answers

How does clopidogrel exert its effect on platelet activation?

<p>By inhibiting glycoprotein (GP IIb/IIIa receptors (B)</p> Signup and view all the answers

Which hepatic enzyme inhibitor can diminish the action of clopidogrel?

<p>Omeprazole (D)</p> Signup and view all the answers

What is the alternative prophylactic therapy to aspirin in the secondary prevention of stroke and myocardial infarction?

<p>Clopidogrel (A)</p> Signup and view all the answers

Which of the following drugs is a murine monoclonal antibody against the GP IIb IIIa?

<p>Abciximab (B)</p> Signup and view all the answers

What is the primary prophylactic use of Dipyridamole in combination with warfarin?

<p>To prevent thrombosis in patients with prosthetic heart valves (C)</p> Signup and view all the answers

Which drug is a coronary vasodilator that increases CAMP and decreases thromboxane A2 synthesis?

<p>Dipyridamole (A)</p> Signup and view all the answers

What is the main disadvantage associated with the use of Eptifibatide?

<p>Oral toxicity (D)</p> Signup and view all the answers

What is the primary difference between standard heparin and low molecular weight heparin?

<p>Low molecular weight heparin has greater bioavailability than standard heparin (C)</p> Signup and view all the answers

How does heparin exert its anticoagulant effect?

<p>By inhibiting the action of antithrombin III (A)</p> Signup and view all the answers

What is the primary advantage of low molecular weight heparin over standard heparin?

<p>It is more effective in preventing thromboembolism (C)</p> Signup and view all the answers

Which type of administration is available for low molecular weight heparin?

<p>Subcutaneous administration (A)</p> Signup and view all the answers

What is the primary therapeutic use of heparin according to the given text?

<p>Treating myocardial infarction (B)</p> Signup and view all the answers

Why is intramuscular heparin contraindicated according to the given text?

<p>It may cause hematoma formation (A)</p> Signup and view all the answers

What is the maximal anticoagulant effect of intravenous heparin according to the text?

<p>Within minutes after injection (B)</p> Signup and view all the answers

In which condition is heparin contraindicated according to the text?

<p>Recent surgery (D)</p> Signup and view all the answers

What is the mechanism of action of warfarin?

<p>Induces the formation of structurally incomplete clotting factors (D)</p> Signup and view all the answers

Where does warfarin primarily induce hypocoagulability?

<p>In vivo (A)</p> Signup and view all the answers

In which condition is warfarin contraindicated?

<p>Presence of active or past gastrointestinal ulceration (D)</p> Signup and view all the answers

What is a therapeutic use of warfarin?

<p>Prevention of thromboembolism in atrial fibrillation (C)</p> Signup and view all the answers

What is the purpose of thrombolytic therapy?

<p>To rapidly destroy already formed clots (D)</p> Signup and view all the answers

Which drug is superior to streptokinase and urokinase in dissolving older clots?

<p>Alteplase (A)</p> Signup and view all the answers

What is the mechanism of action of plasmin in thrombolytic therapy?

<p>Catalyzing the degradation of fibrin (D)</p> Signup and view all the answers

When is alteplase administered for ischemic stroke?

<p>Within 3 hours of onset (B)</p> Signup and view all the answers

Which drug is contraindicated in pregnancy, metastatic cancers, and history of cerebrovascular accidents?

<p>Anistreolase (D)</p> Signup and view all the answers

What is the primary therapeutic use of Urokinase according to the given text?

<p>Severe pulmonary emboli (C)</p> Signup and view all the answers

Which drug is a third-generation thrombolytic?

<p>Reteplase (C)</p> Signup and view all the answers

What are the adverse effects associated with Streptokinase?

<p>Bleeding, hypersensitivity (B)</p> Signup and view all the answers

Which drug is used to reverse the effect of heparin?

<p>Vitamin K (A)</p> Signup and view all the answers

What is the primary function of Aprotinin?

<p>Inhibits streptokinase bleeding (D)</p> Signup and view all the answers

What is the therapeutic use of Sodium bicarbonate according to the given text?

<p>Treating aspirin toxicity (D)</p> Signup and view all the answers

What is the primary adverse effect associated with the use of Protamine sulfate?

<p>Bradycardia (D)</p> Signup and view all the answers

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