Hemostasis

What happens during the last step of hemostasis?

• vascular spasms constrict the flow of blood

• platelet plug forms, platelets adhere

• coagulation form fibers, scab forms

• thromus breaks away from vessel wall

The phases of hemostasis in the correct order?

• platelet plug formation, coagulation, fibrinolysis

• vascular spasm, coagulation, platelet plug formation

• platelet plug formation, vascular spasm, coagulation

• vascular spasm, fibrinolysis, coagulation

Tags

NGSS.HS-LS1-3

Which clotting factor is measured by PTT tests?

• II, VII, IX, X

• VII, X, V, II, I

• XII, XI, IX, VIII, X, V, II, I
  
  

• XII, VII, X, V, II, I

Which of the following statements about platelets is INCORRECT?

• Platelets adhere to collagen fibers of damaged tissue

• Platelets are cell fragments of megakaryocytes

• Platelets activate the clotting cascade

• Platelets are involved in clot dissolution

What is the first factor formed as a result of the extrinsic and intrinsic pathways of clot formation?

• fibrin

• thrombin

• factor X

• factor XIII

Which enzyme converts fibrinogen to fibrin?

• serotonin

• thrombin

• factor X

• factor XIII

Which one of the following blood components helps it to clot when the skin is cut?

• Red blood cells

• White blood cells

• Plasma

• Platelets

this is when platelets attach to the exposed damaged wall of the blood vessels

• Platelet adhesion

• Platelet aggregation

• Platelet plug

• degranulation

If your PT, PTT were both abnormal which factor is most likely deficient

• VIII

• IX

• XI

• X

What is the primary function of hemostasis in the human body?

• To maintain blood pressure

• To prevent blood loss

• To regulate body temperature

• To transport oxygen

Tags

NGSS.HS-LS1-3