Question 1

Which of the following best describes the primary function of hemostasis?

Accepted Answer

To stop blood flow following vessel injury

Question 2

During the initial phase of hemostasis, which mediator is primarily responsible for vasoconstriction?

Accepted Answer

Thromboxane (TXA)

Question 3

A patient presents with excessive bleeding after minor trauma. Laboratory tests reveal a normal platelet count but prolonged partial thromboplastin time (PTT). Which disorder is most likely?

Accepted Answer

Hemophilia (coagulation factor deficiency)

Question 4

Which of the following equations correctly represents the calculation of the International Normalized Ratio (INR) used to assess coagulation?

Accepted Answer

$$ INR = \left( \frac{PT_{patient}}{PT_{normal}} \$$right)^{ISI}$$ $$

Question 5

Which of the following is a common cause of platelet dysfunction leading to bleeding disorders?

Accepted Answer

Von Willebrand disease

Question 6

A patient with chronic kidney disease develops a bleeding tendency. Which mechanism best explains this finding?

Accepted Answer

Platelet dysfunction due to uremia

Question 7

Which process is responsible for the dissolution of a clot after tissue repair?

Accepted Answer

Activation of plasminogen to plasmin

Question 8

A patient with deep vein thrombosis is found to have a mutation in the Factor V gene that prevents its inactivation by Protein C. What is the most likely diagnosis?

Accepted Answer

Factor V Leiden

Question 9

Which laboratory test is most useful for detecting fibrin degradation products in suspected disseminated intravascular coagulation (DIC)?

Accepted Answer

D-dimer assay

Question 10

Which of the following treatments is most appropriate for a patient with hemophilia A experiencing acute bleeding?

Accepted Answer

Cryoprecipitate (contains Factor VIII)

Question 11

Which of the following best explains why arterial thrombosis is more commonly associated with platelet activation than coagulation factor defects?

Accepted Answer

Arteries experience high flow and turbulence, leading to endothelial damage and platelet activation

Question 12

A patient is prescribed an antiplatelet agent following a myocardial infarction. Which of the following is a common side effect of this therapy?

Accepted Answer

Bleeding tendency

Question 13

Which of the following is a key difference between platelet-related and coagulation-related bleeding disorders?

Accepted Answer

Platelet disorders often present with petechiae and mucosal bleeding, while coagulation disorders present with deep tissue hematomas

Question 14

Which of the following is most likely to cause thrombocytosis?

Accepted Answer

Polycythemia vera

Question 15

Which of the following best describes the role of von Willebrand Factor (VWF) in hemostasis?

Accepted Answer

It mediates platelet adhesion to the site of vascular injury

Question 16

A patient with antiphospholipid syndrome is at increased risk for which of the following?

Accepted Answer

Thrombosis due to increased coagulation activity

Question 17

Which of the following is the correct sequence of events in the formation of a hemostatic plug?

Accepted Answer

Vasoconstriction → Platelet plug formation → Coagulation (fibrin clot)

Question 18

Which of the following laboratory findings is most consistent with disseminated intravascular coagulation (DIC)?

Accepted Answer

Decreased platelet count, increased D-dimer

Question 19

Which of the following treatments provides all coagulation factors and is used in severe bleeding disorders?

Accepted Answer

Fresh frozen plasma (FFP)

Question 20

A patient with a history of splenomegaly presents with a low platelet count. Which mechanism best explains this finding?

Accepted Answer

Increased platelet destruction/sequestration by the spleen

Hemostasis and Related Disorders: Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드