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WorksheetsHaemostasis Quiz
Total questions: 15
Worksheet time: 8mins
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
What is the average lifespan of platelets in the blood?
30-45 days
14-21 days
7-10 days
1-3 days
Which of the following is not a granular content of platelets?
Plasminogen activator inhibitor (PAI-1)
Fibrinogen
Serotonin
ATP
What is the main function of platelet factor 4 and beta-thromboglobulin?
Enhance platelet adherence & aggregation
Proliferation of endothelial cells, smooth muscle & fibroblast cells
Source of ADP for vasoconstriction
Inhibit heparin released by mast cells & basophils
What is the main ligand for GPIIb/IIIa adhesion glycoprotein on platelet?
Thromboxane A2 (TXA2)
Fibrinogen
Von Willebrand factor (vWF)
Collagen
What is the main role of arachidonic acid in platelet aggregation?
Balancing act for platelet aggregation
Conversion into prostacyclin in platelets
Inhibition of platelet adherence
Source of energy for vasoconstriction
