Q: Which of the following equations correctly represents the conversion of prothrombin to thrombin during coagulation?

$$\mathrm{Prothrombin} \xrightarrow{\text{Prothrombin\ Activator}} \mathrm{Thrombin}$$

Question 1

Which of the following is NOT a function of blood in the human body?

Accepted Answer

Synthesizing hormones for the endocrine system

Question 2

A centrifuged tube of whole blood separates into three layers. Which layer contains the majority of the body's immune cells?

Accepted Answer

Buffy coat

Question 3

Which plasma protein is most responsible for maintaining osmotic pressure and acts as a blood buffer?

Accepted Answer

Albumin

Question 4

A patient presents with fatigue, pallor, and shortness of breath. Laboratory results show microcytic, hypochromic red blood cells. Which type of anemia is most likely?

Accepted Answer

Iron-deficiency anemia

Question 5

Which of the following best explains why mature erythrocytes are highly efficient at gas transport?

Accepted Answer

They have a biconcave shape, lack a nucleus, and are packed with hemoglobin

Question 6

Which hormone is primarily responsible for stimulating erythropoiesis, and where is it mainly produced?

Accepted Answer

Erythropoietin, produced by the kidneys

Question 7

A patient with chronic kidney disease develops anemia. Which mechanism best explains this finding?

Accepted Answer

Decreased production of erythropoietin

Question 8

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

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 9

A patient receives a transfusion of mismatched blood and develops fever, chills, and hemoglobinuria. What is the most likely cause of these symptoms?

Accepted Answer

Agglutination and destruction of donor erythrocytes by recipient antibodies

Question 10

Which of the following equations correctly represents the conversion of prothrombin to thrombin during coagulation?

Accepted Answer

$$\mathrm{Prothrombin} \xrightarrow{	ext{Prothrombin\ Activator}} \mathrm{Thrombin}$$

Question 11

Which white blood cell type is most abundant in normal blood and is a key phagocyte during acute bacterial infections?

Accepted Answer

Neutrophil

Question 12

A patient with hemophilia A is deficient in which clotting factor?

Accepted Answer

Factor VIII

Question 13

Which of the following best describes the role of plasmin in the body?

Accepted Answer

Digests fibrin and dissolves blood clots

Question 14

A patient living at high altitude develops secondary polycythemia. Which physiological change is most likely responsible?

Accepted Answer

Increased erythropoietin production due to hypoxia

Question 15

Which of the following statements about the ABO blood group system is correct?

Accepted Answer

Type AB blood has neither anti-A nor anti-B antibodies in plasma

Question 16

Which vitamin is essential for the synthesis of several clotting factors, and what is a possible consequence of its deficiency?

Accepted Answer

Vitamin K; impaired coagulation and bleeding

Question 17

A patient with a genetic mutation resulting in abnormal beta chains of hemoglobin is most likely to develop which disorder?

Accepted Answer

Sickle-cell anemia

Question 18

Which of the following best describes the process of diapedesis?

Accepted Answer

The passage of leukocytes through capillary walls into tissues

Question 19

Which of the following is a direct result of the activation of the intrinsic pathway of coagulation?

Accepted Answer

Activation of factor X and formation of prothrombin activator

Question 20

A patient with a low platelet count (thrombocytopenia) is at increased risk for which of the following?

Accepted Answer

Spontaneous bleeding and petechiae

Blood: Structure, Function, and Clinical Aspects

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