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

In a healthy cardiovascular system, the endothelium is very smooth and coated with ______, which prevents adherence of platelets to the endothelium. Thus, unneeded blood clots do not form.Multiple choice question.serotoninprostacyclinhistamineprostaglandins

Determine which of the following best represents the two statements belowa. Platelets adhere to themselves and and other adhesion factors such as von Willebrand's factorb. Prostacyclin and nitric oxide both inhibit platelet aggregationQuestion 4Select one:a.Both statements a and b are trueb.Statement a is true while statement b is falsec.Both statements a and b are falsed.Statement b is true while statement a is false

Select the anti-platelet drug that works by inhibiting glycoprotein IIb/IIIa.

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.

An anticoagulant called hirudin is used by ______ to keep the blood from clotting while they are feeding.Multiple choice question.roundwormsleechesearthwormsflatworms