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

Question 1

Which of the following best explains why erythrocytes (red blood cells) are biconcave in shape?

Accepted Answer

The biconcave shape increases the cell's surface area-to-volume ratio, facilitating efficient gas exchange.

Question 2

A patient is diagnosed with anemia due to a lack of intrinsic factor. Which vitamin deficiency is most likely responsible for this condition?

Accepted Answer

Vitamin B12

Question 3

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

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 4

A person with type AB blood can safely receive red blood cells from which of the following blood types?

Accepted Answer

Type O, Type A, Type B, and Type AB

Question 5

Which plasma protein is most responsible for maintaining the osmotic pressure of blood?

Accepted Answer

Albumin

Question 6

A patient at high altitude develops secondary polycythemia. Which physiological mechanism best explains this response?

Accepted Answer

Low oxygen levels stimulate increased erythropoietin (EPO) production, leading to increased red blood cell formation.

Question 7

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

Accepted Answer

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

Question 8

A patient with a deficiency in factor VIII would most likely be diagnosed with which disorder?

Accepted Answer

Hemophilia A

Question 9

Which of the following best describes the role of neutrophils in the immune response?

Accepted Answer

They are highly phagocytic and are the first responders to bacterial infections.

Question 10

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

Accepted Answer

Agglutination and hemolysis of donor red blood cells

Question 11

Which of the following statements about erythropoiesis is correct?

Accepted Answer

Erythropoietin (EPO) is released by the kidneys in response to hypoxia.

Question 12

Which of the following best explains why patients with liver disease may have impaired blood clotting?

Accepted Answer

The liver synthesizes most clotting factors, so liver dysfunction reduces their production.

Question 13

Which of the following best describes the function of platelets in hemostasis?

Accepted Answer

They form a temporary plug by adhering to exposed collagen at the site of vessel injury.

Question 14

A patient with chronic kidney disease develops anemia. Which of the following best explains this finding?

Accepted Answer

The kidneys produce less erythropoietin, leading to decreased red blood cell production.

Question 15

Which of the following is a function of the complement proteins found in blood?

Accepted Answer

They help destroy pathogens by enhancing phagocytosis and promoting cell lysis.

Question 16

A patient with sickle-cell anemia is likely to experience which of the following complications during vigorous exercise?

Accepted Answer

Increased sickling of red blood cells due to decreased oxygen binding

Question 17

Which of the following best describes the fate of the heme group from hemoglobin after erythrocyte destruction?

Accepted Answer

It is converted to bilirubin, which is excreted in bile.

Question 18

Which of the following best explains why vitamin K deficiency can lead to bleeding disorders?

Accepted Answer

Vitamin K is required for the synthesis of several clotting factors.

Question 19

Which of the following best describes the process of fibrinolysis?

Accepted Answer

It is the enzymatic breakdown of a blood clot by plasmin.

Blood: Structure, Function, and Disorders – Mini-Textbook Study Notes for GOB Chemistry

Study Guide - Practice Questions