Question 1

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

Accepted Answer

It stabilizes platelet-collagen adhesion during platelet plug formation.

Question 2

A patient with a deficiency in Factor VIII would most likely present with which condition?

Accepted Answer

Hemophilia A

Question 3

During the coagulation cascade, which ion is essential for the activation of several clotting factors?

Accepted Answer

Ca$$^{2+}$$

Question 4

Which phase of hemostasis involves the transformation of blood from a liquid to a gel?

Accepted Answer

Coagulation

Question 5

A patient receives a transfusion of mismatched blood. Which of the following is the most immediate risk?

Accepted Answer

Renal failure due to hemoglobin release

Question 6

Which of the following statements about the intrinsic pathway of coagulation is correct?

Accepted Answer

It is initiated by negatively charged phospholipids on activated platelets.

Question 7

What is the primary function of antithrombin III in the regulation of hemostasis?

Accepted Answer

It inactivates any unbound thrombin to prevent excessive clotting.

Question 8

A patient with thrombocytopenia is most at risk for which of the following complications?

Accepted Answer

Spontaneous, widespread hemorrhage (petechiae)

Question 9

Which of the following drugs acts by inhibiting thromboxane A$$_2 to $$reduce the risk of heart attack?

Accepted Answer

Aspirin

Question 10

A woman who is Rh$$^-$$ becomes pregnant with an Rh$$^+$$ fetus. What is the risk in subsequent pregnancies if she is not treated?

Accepted Answer

Her anti-Rh antibodies may cross the placenta and destroy fetal RBCs.

Question 11

Which of the following is TRUE regarding the ABO blood group system?

Accepted Answer

Type O blood has neither A nor B antigens on RBCs.

Question 12

Which process is responsible for breaking down a blood clot after tissue repair?

Accepted Answer

Fibrinolysis

Question 13

Which of the following is a direct effect of thrombin in the coagulation cascade?

Accepted Answer

Conversion of fibrinogen to fibrin

Question 14

A patient with impaired liver function is likely to have problems with hemostasis because:

Accepted Answer

The liver synthesizes most clotting factors.

Question 15

Which of the following best explains why packed RBC transfusions are preferred over whole-blood transfusions in most cases?

Accepted Answer

Packed RBCs restore oxygen-carrying capacity without excess plasma volume.

Question 16

Which of the following is a mechanism that limits the growth of a blood clot?

Accepted Answer

Swift removal and dilution of clotting factors

Question 17

A patient with a platelet count of 120,000/$$\mul is $$most likely to be diagnosed with:

Accepted Answer

Thrombocytopenia

Question 18

Which of the following is required for the synthesis of several clotting factors in the liver?

Accepted Answer

Vitamin K

Question 19

Which of the following is the correct sequence of events in hemostasis?

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 20

Which of the following is a real-world consequence of a transfusion reaction involving mismatched blood?

Accepted Answer

Hemoglobin released from lysed RBCs can cause renal failure.

Lecture 12 Hemostasis, Blood Clotting, and Blood Groups: Study Notes for Anatomy & Physiology

Study Guide - Practice Questions