Select the correct statements. (Note that there may be more than one correct statement.)Group of answer choicesHeparin and warfarin effectively inhibit platelet aggregation.Heparin cannot be absorbed from the gastrointestinal tract and therefore it is an injectable anticoagulant.Thrombolytic substances dissolve existing blood clots but cannot prevent their formation.One of the reasons Warfarin should not be administered in pregnancy is that it crosses the placenta and therefore may cause cerebral haemorrhage in the fetus during delivery.

The presence of a compound called ______ inhibits adherence of platelets to endothelial cells lining blood vessel walls.Multiple choice question.antithrombinprostacyclinheparin

How does heparin prevent the clotting of blood?Multiple ChoiceBy binding to calcium ionsBy depleting the blood of plateletsBy inhibiting the formation of prothrombin activator and the action of thrombin on fibrinogenBy interfering with the formation of thrombin and fibrinogen

A 52-year-old female presents to the emergency room with swelling over her right calf for the past 3 days. Her right calf is warm, erythematous, and tender to palpation. A duplex is performed and shows a deep vein thrombosis (DVT). This is her first DVT. She is started on warfarin and told that she must continue it for the next 3 months. What effect does warfarin have on the coagulation panel?Question 6Answera.Increases bleeding timeb.Increases prothrombin timec.Decreases partial thromboplastin timed.Increases partial thromboplastin timee.Decreases prothrombin time

Select the correct statements. (Note that there may be more than one correct statement.)Group of answer choicesAtrial fibrillation is one of the risk factors for thrombus formation.Thrombolytic substances dissolve existing blood clots and therefore are the first choice of treatment in the case of haemorrhagic stroke.When detached from its site of production, a blood clot that has formed in the left atrium will most likely block a pulmonary blood vessel and therefore cause pulmonary embolism.Aspirin should not be administered in children because it may trigger post-viral encephalitis.

What function do the compounds heparin and coumadin have in common?Multiple ChoiceDissolution of fibrin clotStabilization of fibrin clotInitiation of coagulationPrevention of coagulation