Q: Which of the following equations correctly represents the oxygen content of arterial blood ($$CaO_2$$)?

$$CaO_2 = (1.34$$ \times [Hb] \times $$SaO_2) + (0.003$$ \times $$PaO_2$$)$$

Question 1

Which of the following best explains the physiological response of the kidneys to anemia?

Accepted Answer

The kidneys increase erythropoietin production, stimulating the bone marrow to produce more red blood cells.

Question 2

A patient presents with fatigue, pallor, and laboratory findings of low hemoglobin (Hb), low hematocrit (HCT), and low reticulocyte count. Which type of anemia is most likely?

Accepted Answer

Aplastic anemia

Question 3

Which of the following laboratory findings is most consistent with iron deficiency anemia?

Accepted Answer

Low MCV, low mean corpuscular hemoglobin (MCH), and low serum ferritin

Question 4

A 25-year-old woman presents with macrocytic anemia, glossitis, and neurological symptoms. Which deficiency is most likely responsible?

Accepted Answer

Vitamin B\_{12} deficiency

Question 5

Which of the following equations correctly represents the oxygen content of arterial blood ($$CaO_2$$)?

Accepted Answer

$$CaO_2 = (1.34$$ 	imes [Hb] 	imes $$SaO_2) + (0.003$$ 	imes $$PaO_2$$)$$

Question 6

A child of Mediterranean descent presents with microcytic anemia and target cells on a blood smear. Which diagnosis is most likely?

Accepted Answer

Thalassemia

Question 7

Which of the following is a common complication of sickle cell anemia due to occlusion of small arteries?

Accepted Answer

Tissue ischemia and infarctions

Question 8

A patient with chronic kidney disease develops anemia. What is the primary cause of this anemia?

Accepted Answer

Decreased erythropoietin production by the kidneys

Question 9

Which of the following best describes the pathophysiology of hereditary spherocytosis?

Accepted Answer

Defective red cell membrane proteins causing spherical, fragile red blood cells

Question 10

A patient with a history of drug exposure develops hemolytic anemia. Which laboratory finding is most likely?

Accepted Answer

High reticulocyte count

Question 11

Which of the following is a distinguishing laboratory feature of aplastic anemia?

Accepted Answer

Low reticulocyte count and pancytopenia

Question 12

A patient with sickle cell anemia is at increased risk for which of the following complications?

Accepted Answer

Painful vaso-occlusive crises

Question 13

Which of the following best explains why patients with vitamin B\_{12} deficiency may develop neurological symptoms?

Accepted Answer

Vitamin B\_{12} is necessary for myelin synthesis in the nervous system.

Question 14

Which of the following is the most likely laboratory finding in a patient with thalassemia?

Accepted Answer

Low MCV and target cells on blood smear

Question 15

A patient with glucose-6-phosphate dehydrogenase (G6PD) deficiency is exposed to an oxidant drug. What is the expected outcome?

Accepted Answer

Hemolysis due to oxidative damage of red blood cells

Question 16

Which of the following best describes the difference between relative and absolute polycythemia?

Accepted Answer

Relative polycythemia is due to decreased plasma volume, while absolute polycythemia is due to increased red cell mass.

Question 17

A patient with anemia has a low mean corpuscular volume (MCV), low mean corpuscular hemoglobin (MCH), and low serum ferritin. Which is the most likely diagnosis?

Accepted Answer

Iron deficiency anemia

Question 18

Which of the following is a common cause of secondary polycythemia?

Accepted Answer

Chronic hypoxia from lung disease

Question 19

A patient with hereditary spherocytosis is most likely to have which of the following findings on a peripheral blood smear?

Accepted Answer

Spherocytes (small, round red blood cells without central pallor)

Question 20

Which of the following best explains the increased risk of infection in patients with sickle cell anemia?

Accepted Answer

Functional asplenia due to repeated splenic infarctions

Anemia and Erythrocyte Disorders: Mechanisms, Types, and Clinical Features

Study Guide - Practice Questions

Study Guide - Flashcards