Q: Which of the following equations correctly represents the oxygen-carrying capacity of hemoglobin in the blood?

$$C_{O_2$} = [Hb] \times 1.34 \ \mathrm{mL} \, O_2$/\mathrm{g} \ Hb \times S_{O_2$}$$

Question 1

Which of the following best describes the primary function of erythrocytes in the human body?

Accepted Answer

To transport oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs

Question 2

A patient with anemia is found to have a deficiency in erythropoietin. Which of the following best explains the physiological consequence of this deficiency?

Accepted Answer

Impaired production of erythrocytes, leading to decreased oxygen-carrying capacity

Question 3

Which of the following equations correctly represents the oxygen-carrying capacity of hemoglobin in the blood?

Accepted Answer

$$C_{O_2$} = [Hb] 	imes 1.34 \ \mathrm{mL} \, O_2$/\mathrm{g} \ Hb 	imes S_{O_2$}$$

Question 4

A person with blood type AB+ is considered a universal recipient for blood transfusions. Which of the following best explains why?

Accepted Answer

They have both A and B antigens and the Rh antigen, so they do not produce anti-A, anti-B, or anti-Rh antibodies

Question 5

Which of the following best distinguishes between the intrinsic and extrinsic pathways of the coagulation cascade?

Accepted Answer

The intrinsic pathway is activated by contact with negatively charged surfaces, while the extrinsic pathway is initiated by tissue factor from damaged tissues.

Question 6

A patient receives a transfusion of type A blood but is type B. Which of the following is the most likely immediate consequence?

Accepted Answer

The patient's anti-A antibodies will attack the transfused erythrocytes, causing agglutination and hemolysis.

Question 7

Which of the following best describes the role of megakaryocytes in the formation of platelets?

Accepted Answer

Megakaryocytes release platelets by shedding cytoplasmic fragments into the bloodstream.

Question 8

Which of the following statements about plasma proteins is correct?

Accepted Answer

Albumin is the most abundant plasma protein and is primarily responsible for maintaining osmotic pressure.

Question 9

A patient with a vitamin K deficiency is likely to experience which of the following symptoms?

Accepted Answer

Impaired blood clotting due to decreased synthesis of clotting factors

Question 10

Which of the following best explains the positive feedback mechanism in platelet plug formation during hemostasis?

Accepted Answer

Platelets release ADP and thromboxane A2, which attract more platelets to the site of injury, amplifying the response.

Question 11

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

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 12

Which of the following best describes the function of leukocytes?

Accepted Answer

Defending the body against pathogens and foreign substances

Question 13

A laboratory test shows a patient has an abnormally high number of neutrophils. Which of the following is the most likely explanation?

Accepted Answer

The patient is experiencing a bacterial infection.

Question 14

Which of the following statements about the breakdown of hemoglobin is correct?

Accepted Answer

Hemoglobin is broken down into amino acids, iron, and bilirubin; bilirubin is excreted in bile.

Question 15

Which of the following best explains why type O- blood is considered the universal donor?

Accepted Answer

Type O- blood lacks A, B, and Rh antigens, so it does not trigger an immune response in recipients.

Question 16

Which of the following is a key difference between granulocytes and agranulocytes?

Accepted Answer

Granulocytes contain visible cytoplasmic granules and include neutrophils, eosinophils, and basophils; agranulocytes lack visible granules and include lymphocytes and monocytes.

Question 17

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

Accepted Answer

Excessive bleeding due to insufficient platelet plug formation

Question 18

Which of the following best describes the process of fibrinolysis?

Accepted Answer

The breakdown and removal of a blood clot after tissue repair

Question 19

Which of the following statements about the prevalence of leukocyte types in normal blood is correct?

Accepted Answer

Neutrophils are the most abundant type of leukocyte in normal blood.

Question 20

A patient with liver disease has decreased synthesis of plasma proteins. Which of the following is a likely consequence?

Accepted Answer

Decreased plasma osmotic pressure, leading to edema

Blood: Structure, Function, and Clinical Relevance – Study Notes

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