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

$$1 \ \text{Hb molecule} = 4 \ \text{O}_2 \ \text{molecules}$$

Question 1

Which of the following best describes the primary functions of blood in the human body?

Accepted Answer

Transport, regulation, and protection

Question 2

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

Accepted Answer

Iron-deficiency anemia

Question 3

Which of the following statements about erythrocytes is correct?

Accepted Answer

They lack nuclei and mitochondria, allowing for efficient gas transport

Question 4

A blood sample is centrifuged. Which layer contains the majority of white blood cells and platelets?

Accepted Answer

The buffy coat

Question 5

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

Accepted Answer

$$1 \ 	ext{Hb molecule} = 4 \ 	ext{O}_2 \ 	ext{molecules}$$

Question 6

A 25-year-old athlete trains at high altitude and develops increased red blood cell count. Which hormone is primarily responsible for this adaptation?

Accepted Answer

Erythropoietin (EPO)

Question 7

Which of the following best explains why erythrocytes are biconcave in shape?

Accepted Answer

To increase surface area for gas exchange

Question 8

A patient with chronic kidney disease develops anemia. What is the most likely cause?

Accepted Answer

Decreased production of erythropoietin

Question 9

Which of the following is a correct sequence in the development of erythrocytes?

Accepted Answer

Hematopoietic stem cell $$\rightarrow$$ myeloid stem cell $$\rightarrow$$ proerythroblast $$\rightarrow$$ erythroblast $$\rightarrow$$ reticulocyte $$\rightarrow$$ erythrocyte

Question 10

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

Accepted Answer

It is degraded to bilirubin, which is secreted in bile

Question 11

A patient with sickle cell anemia is less likely to contract malaria. What is the most plausible explanation for this observation?

Accepted Answer

The altered hemoglobin impairs the malaria parasite's life cycle

Question 12

Which of the following is a function of platelets in hemostasis?

Accepted Answer

Forming a temporary plug to seal breaks in blood vessels

Question 13

A patient receives a blood transfusion with an incompatible blood type. Which type of anemia is most likely to result?

Accepted Answer

Hemolytic anemia

Question 14

Which plasma protein is most abundant and plays a key role in maintaining osmotic pressure?

Accepted Answer

Albumin

Question 15

A patient with polycythemia vera is at increased risk for which of the following complications?

Accepted Answer

Blood clot formation due to increased blood viscosity

Question 16

Which of the following nutrients is essential for DNA synthesis in rapidly dividing erythrocyte precursors?

Accepted Answer

Vitamin B$$_{12}$$

Question 17

A laboratory test shows a reticulocyte count significantly above normal. What does this indicate about erythropoiesis?

Accepted Answer

Increased rate of red blood cell production

Question 18

Which of the following best explains why iron is bound to proteins such as transferrin in the blood?

Accepted Answer

To prevent toxicity and facilitate safe transport

Question 19

A patient with a bleeding ulcer develops chronic blood loss. Which type of anemia is most likely to develop?

Accepted Answer

Chronic hemorrhagic anemia

Question 20

Which of the following best describes the role of nitric oxide (NO) and prostacyclin released by endothelial cells?

Accepted Answer

They keep circulating platelets inactive and mobile

Blood: Structure, Function, and Disorders (Chapter 17 Study Notes)

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