Hema 2 Lecture Quiz 4

What is the first response of the vascular system to injury?

• Platelet aggregation

• Vasoconstriction

• Coagulation factor activation

• Fibrinolysis

Which component is responsible for forming the initial platelet plug?

• Fibrin

• Collagen

• Platelets

• Thrombin

Which of the following describes secondary hemostasis?

• Formation of a fibrin clot

• Vasoconstriction

• Platelet adhesion and aggregation

• Secretion of serotonin and ADP

Which enzyme converts fibrinogen into fibrin?

• Thrombin

• Plasmin

• Factor XIII

• Factor X

Which condition is caused by a defect in primary hemostasis?

• Hemophilia A

• von Willebrand disease

• Factor V Leiden mutation

• Disseminated intravascular coagulation (DIC)

Which layer of the blood vessel wall is composed of endothelial cells?

• Tunica intima

• Tunica media

• Tunica adventitia

• Subendothelium

Which type of blood vessels have the thickest walls?

• Veins

• Arteries

• Capillaries

• Venules

What is the function of endothelin-1?

• Stimulates fibrinolysis

• Causes vasoconstriction

• Activates platelet adhesion

• Breaks down fibrin clots

Where are sinusoids primarily found?

• Liver, spleen, and bone marrow

• Brain and kidneys

• Lungs and heart

• Skin and muscles

Which vessel type primarily regulates blood flow into capillary networks?

• Veins

• Arteries

• Arterioles

• Venules