NR 507 Advanced Pathophysiology
Week 2 Exam: Hematologic Disorders
and Anemias 100 Questions with
Answers and Rationales
SECTION A: Overview of Hematopoiesis and Blood
Components (Questions 1-15)
1. Hematopoiesis is the process of:
A) Blood clotting
B) Blood cell formation
C) Oxygen transport
D) Immune response
Correct Answer: B) Blood cell formation
Expert Rationale: Hematopoiesis is the process of blood cell
formation (production, development, and maturation of all blood
cells). It occurs primarily in the bone marrow. Hematopoiesis
involves the differentiation of hematopoietic stem cells
(hemocytoblasts) into all blood cell types .
2. In adults, hematopoiesis primarily occurs in the:
A) Liver and spleen
B) Bone marrow (red marrow)
,C) Thymus and lymph nodes
D) Yellow marrow
Correct Answer: B) Bone marrow (red marrow)
Expert Rationale: In adults, hematopoiesis occurs primarily in red
bone marrow located in the flat bones (pelvis, sternum, ribs,
vertebrae) and the proximal epiphyses of long bones. In fetal
development, hematopoiesis occurs in the yolk sac, liver, and spleen
before shifting to bone marrow .
3. Which of the following is NOT a formed element of blood?
A) Erythrocyte
B) Leukocyte
C) Platelet
D) Plasma
Correct Answer: D) Plasma
Expert Rationale: Plasma is the liquid component of blood, not a
formed element. The formed elements of blood are erythrocytes (red
blood cells), leukocytes (white blood cells), and thrombocytes
(platelets) .
4. The average life span of a red blood cell (RBC) is
approximately:
A) 10-20 days
B) 30-60 days
,C) 90-120 days
D) 180-240 days
Correct Answer: C) 90-120 days
Expert Rationale: The average life span of a mature erythrocyte is
approximately 90-120 days (about 4 months). After this time,
senescent RBCs are removed by macrophages in the spleen, liver,
and bone marrow .
5. Which nutrient is essential for erythropoiesis (RBC
production)?
A) Vitamin C
B) Vitamin D
C) Vitamin B12 and folate
D) Vitamin A
Correct Answer: C) Vitamin B12 and folate
Expert Rationale: Vitamin B12 (cobalamin) and folate (folic acid)
are essential for DNA synthesis and RBC production. Deficiency
leads to ineffective erythropoiesis and megaloblastic anemia. Iron is
also essential for hemoglobin synthesis .
6. Erythropoietin (EPO) is produced primarily by the:
A) Liver
B) Kidneys
, C) Bone marrow
D) Spleen
Correct Answer: B) Kidneys
Expert Rationale: Erythropoietin (EPO) is produced primarily by
the peritubular interstitial cells of the kidneys in response to
hypoxia (low oxygen levels). A small amount is produced by the
liver. EPO stimulates erythrocyte production in the bone marrow .
7. Which of the following stimulates erythropoietin release?
A) Hyperoxia
B) Hypoxia
C) Hypercapnia
D) Acidosis
Correct Answer: B) Hypoxia
Expert Rationale: Hypoxia (low tissue oxygen) is the primary
stimulus for erythropoietin release from the kidneys. Chronic
hypoxia can result from high altitude, chronic lung disease, or
anemia .
8. Hemoglobin is composed of:
A) Two alpha chains and two beta chains
B) Four iron molecules
C) Two globin chains and four heme groups
D) Albumin and globulin
Week 2 Exam: Hematologic Disorders
and Anemias 100 Questions with
Answers and Rationales
SECTION A: Overview of Hematopoiesis and Blood
Components (Questions 1-15)
1. Hematopoiesis is the process of:
A) Blood clotting
B) Blood cell formation
C) Oxygen transport
D) Immune response
Correct Answer: B) Blood cell formation
Expert Rationale: Hematopoiesis is the process of blood cell
formation (production, development, and maturation of all blood
cells). It occurs primarily in the bone marrow. Hematopoiesis
involves the differentiation of hematopoietic stem cells
(hemocytoblasts) into all blood cell types .
2. In adults, hematopoiesis primarily occurs in the:
A) Liver and spleen
B) Bone marrow (red marrow)
,C) Thymus and lymph nodes
D) Yellow marrow
Correct Answer: B) Bone marrow (red marrow)
Expert Rationale: In adults, hematopoiesis occurs primarily in red
bone marrow located in the flat bones (pelvis, sternum, ribs,
vertebrae) and the proximal epiphyses of long bones. In fetal
development, hematopoiesis occurs in the yolk sac, liver, and spleen
before shifting to bone marrow .
3. Which of the following is NOT a formed element of blood?
A) Erythrocyte
B) Leukocyte
C) Platelet
D) Plasma
Correct Answer: D) Plasma
Expert Rationale: Plasma is the liquid component of blood, not a
formed element. The formed elements of blood are erythrocytes (red
blood cells), leukocytes (white blood cells), and thrombocytes
(platelets) .
4. The average life span of a red blood cell (RBC) is
approximately:
A) 10-20 days
B) 30-60 days
,C) 90-120 days
D) 180-240 days
Correct Answer: C) 90-120 days
Expert Rationale: The average life span of a mature erythrocyte is
approximately 90-120 days (about 4 months). After this time,
senescent RBCs are removed by macrophages in the spleen, liver,
and bone marrow .
5. Which nutrient is essential for erythropoiesis (RBC
production)?
A) Vitamin C
B) Vitamin D
C) Vitamin B12 and folate
D) Vitamin A
Correct Answer: C) Vitamin B12 and folate
Expert Rationale: Vitamin B12 (cobalamin) and folate (folic acid)
are essential for DNA synthesis and RBC production. Deficiency
leads to ineffective erythropoiesis and megaloblastic anemia. Iron is
also essential for hemoglobin synthesis .
6. Erythropoietin (EPO) is produced primarily by the:
A) Liver
B) Kidneys
, C) Bone marrow
D) Spleen
Correct Answer: B) Kidneys
Expert Rationale: Erythropoietin (EPO) is produced primarily by
the peritubular interstitial cells of the kidneys in response to
hypoxia (low oxygen levels). A small amount is produced by the
liver. EPO stimulates erythrocyte production in the bone marrow .
7. Which of the following stimulates erythropoietin release?
A) Hyperoxia
B) Hypoxia
C) Hypercapnia
D) Acidosis
Correct Answer: B) Hypoxia
Expert Rationale: Hypoxia (low tissue oxygen) is the primary
stimulus for erythropoietin release from the kidneys. Chronic
hypoxia can result from high altitude, chronic lung disease, or
anemia .
8. Hemoglobin is composed of:
A) Two alpha chains and two beta chains
B) Four iron molecules
C) Two globin chains and four heme groups
D) Albumin and globulin
