Question 1

Which of the following best describes the difference between the primitive and definitive waves of haematopoiesis in vertebrate embryonic development?

Accepted Answer

The primitive wave gives rise to erythrocytes and macrophages in the yolk sac and is transitory, while the definitive wave produces multipotent HSCs in blood islands that give rise to all adult blood lineages.

Question 2

A patient presents with fatigue and pallor. Laboratory results show a haemoglobin level of $$10 \ 	ext{g/dL}$$, MCV of $$70 \ 	ext{fL}$$, and low MCHC. Which type of anaemia is most likely?

Accepted Answer

Microcytic, hypochromic anaemia

Question 3

Which of the following is a key function of the bone marrow stem cell niche?

Accepted Answer

To provide a microenvironment that regulates HSC dormancy, self-renewal, and differentiation

Question 4

Which of the following laboratory findings is most consistent with megaloblastic anaemia?

Accepted Answer

High MCV, low reticulocyte count, and hypersegmented neutrophils

Question 5

Which of the following best explains why mature erythrocytes rely on anaerobic glycolysis for ATP production?

Accepted Answer

They lack mitochondria and nuclei, so they cannot perform oxidative phosphorylation.

Question 6

A patient with chronic kidney disease develops anaemia. Which of the following is the most likely cause?

Accepted Answer

Decreased erythropoietin production by the kidneys

Question 7

Which of the following statements about haematopoietic stem cells (HSCs) is correct?

Accepted Answer

HSCs are multipotent and capable of both self-renewal and multi-lineage differentiation.

Question 8

A blood smear shows spherocytes and an increased reticulocyte count. Which type of anaemia is most likely present?

Accepted Answer

Haemolytic anaemia

Question 9

Which of the following best describes the role of erythropoietin (EPO) in erythropoiesis?

Accepted Answer

EPO is produced by the kidney and stimulates the proliferation and differentiation of erythroid progenitors.

Question 10

A patient with a history of gastric bypass surgery presents with fatigue and glossitis. Laboratory findings reveal a high MCV and low reticulocyte count. Which nutrient deficiency is most likely responsible?

Accepted Answer

Vitamin B12

Question 11

Which of the following is a key feature of extravascular haemolysis?

Accepted Answer

Destruction of RBCs by macrophages in the spleen and liver, leading to increased unconjugated bilirubin

Question 12

Which of the following best explains the increased risk of infection in patients with obesity-driven disruption of haematopoiesis?

Accepted Answer

Obesity causes a shift in the bone marrow environment, impairing immune cell production and function.

Question 13

Which of the following laboratory findings would you expect in a patient with acute blood loss 24 hours after injury?

Accepted Answer

Low haemoglobin, increased reticulocyte count, and normocytic RBCs

Question 14

Which of the following is a primary cause of aplastic anaemia?

Accepted Answer

Failure of bone marrow to produce adequate blood cells due to stem cell dysfunction

Question 15

A patient with hereditary spherocytosis is most likely to have which of the following defects?

Accepted Answer

Deficiency of spectrin or ankyrin in the RBC cytoskeleton

Question 16

Which of the following best describes the function of the Rapoport-Luebering shunt in red blood cells?

Accepted Answer

It produces 2,3-DPG, which facilitates oxygen release from haemoglobin.

Question 17

A patient with sickle cell disease is at increased risk for which type of anaemia?

Accepted Answer

Haemolytic anaemia

Question 18

Which of the following is a key laboratory test for distinguishing between different types of anaemia based on red cell size?

Accepted Answer

Mean Corpuscular Volume (MCV)

Question 19

A patient with thalassemia major is most likely to have which of the following findings?

Accepted Answer

Microcytic, hypochromic red blood cells

Haematopoiesis and Anaemia: Foundations of Blood Cell Development and Disorders

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