Haemostasis Quiz

What is the main function of haemostasis?

• To maintain blood in the fluid state in the vascular compartment

• To regulate body temperature

• To aid in digestion

• To produce red blood cells

Which of the following is not a player in hemostasis?

• Platelets

• Red blood cells

• Fibrinolytic proteins

• Coagulation proteins

What is the main function of the blood vessel's intima layer in hemostasis?

• To produce white blood cells

• To inhibit platelet adherence and occurrence of blood coagulation

• To regulate blood pressure

• To facilitate blood flow

What is the diameter of platelets?

• 1-2 μm

• 5-7 μm

• 15-18 μm

• 10-12 μm

What stimulates megakaryocyte proliferation in the bone marrow?

• Insulin

• Thrombopoietin

• Glucagon

• Erythropoietin

Which of the following is a function of platelet granules?

• Proliferation of endothelial cells

• Enhance platelet adherence & aggregation

• Neutralize tissue plasminogen activator

• Source of energy for vasoconstriction

What is the main function of platelet adhesion receptor GPIIb/IIIa?

• Ligand to collagen

• Ligand to vWF

• Ligand to ADP

• Ligand to fibrinogen

What is the main function of arachidonic acid in platelet aggregation?

• To induce vasoconstriction

• To inhibit platelet activation

• To produce prostacyclin

• To balance platelet aggregation

What is the main cause of pseudothrombocytopenia?

• Increased production of platelets

• Hemolysis of red blood cells

• Decreased production of platelets

• Clumping of platelets from clotting of sample

Where are platelets released from?

• Liver

• Spleen

• Bone marrow

• Kidney