HEMATOLOGY EXAM | COMPLETE STUDY
GUIDE, PRACTICE QUESTIONS AND
ANSWERS
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Updated 2026 Questions and Answers
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,A 35-year-old man undergoing chemotherapy for lymphoma C. Low WBCs impair the inflammatory response
presents with fever and chills for the past 24 hours. He has no
cough, urinary symptoms, or abdominal pain. CBC reveals Explanation: In patients with severe leukopenia, especially neutropenia, signs of
WBC 1,000/mm³ (low). On physical exam, he is febrile to inflammation (redness, pus, swelling) may be blunted or absent, even in the presence of a
101.9°F but otherwise unremarkable. Which of the following serious infection, due to the lack of immune cells to mount a visible response.
best explains the absence of localized signs of infection?
A. Infection is viral in nature
B. Chemotherapy induces thrombocytopenia
C. Low WBCs impair the inflammatory response
D. The fever is a paraneoplastic syndrome
A 48-year-old woman presents for an annual physical with no A. Order B12, folate, and copper levels
complaints. She has no fever, weight loss, or recent illnesses.
Physical exam is unremarkable. As part of routine screening, a Explanation: In a patient with new-onset asymptomatic leukopenia and no concerning
CBC is ordered and reveals a WBC count of 3,000/mm³ (low). clinical features, the next appropriate step is to evaluate for reversible causes, such as
Differential shows a normal distribution of leukocyte subtypes. nutritional deficiencies (B12, folate, copper). Bone marrow biopsy is reserved for patients
What is the next best step in evaluating this new finding? with abnormal smear findings, pancytopenia, or symptoms concerning for malignancy.
Empiric antibiotics and corticosteroids are not indicated without evidence of infection or
A. Order B12, folate, and copper levels autoimmune disease.
B. Empiric antibiotics
C. Bone marrow biopsy
D. Start corticosteroids
What is the primary role of leukocytes in the human body? C. Defend against infection and remove cellular debris
A. Transport oxygen to tissues Explanation: Leukocytes (white blood cells) are part of the immune system. They defend
B. Promote blood clotting against pathogens and help clean up dead or damaged cells, mainly in the tissues.
C. Defend against infection and remove cellular debris
D. Regulate electrolyte balance
,Never Let Monkeys Eat Bananas types of leukocytes (in order of prevalance)
neutrophils (50-67%)
lymphocytes (24-40%)
monocytes (4-9%)
eosinophils (0-3%)
basophils (0-2%)
Which of the following leukocytes is classified as a C. Basophil
granulocyte?
Explanation: Granulocytes include neutrophils, eosinophils, and basophils—they contain
A. Lymphocyte visible granules in their cytoplasm. Lymphocytes and monocytes are agranulocytes.
B. Monocyte
C. Basophil
D. Macrophage
Which of the following best describes the typical lifespan of B. 1-10 days
granulocytes?
Explanation: Granulocytes (neutrophils, eosinophils, basophils) are short-lived cells,
A. Hours generally surviving 1-10 days, and are involved in acute immune responses.
B. 1-10 days
C. Weeks to months
D. Several years
Which of the following groups includes only phagocytic white B. Neutrophils, eosinophils, monocytes
blood cells?
Explanation: Phagocytes include neutrophils, eosinophils, monocytes, and basophils.
A. Neutrophils, lymphocytes, basophils Lymphocytes do not perform phagocytosis; they coordinate immune responses instead.
B. Neutrophils, eosinophils, monocytes While basophils are technically phagocytes, eosinophils and monocytes are more
C. Basophils, lymphocytes, monocytes prominent in that function.
D. Eosinophils, lymphocytes, macrophages
, Which of the following white blood cell types is most C. Lymphocyte
associated with long lifespan and memory immune
responses? Explanation: Lymphocytes (especially memory B and T cells) are agranulocytes with long
lifespans, sometimes lasting months to years, which allows them to retain immunologic
A. Eosinophil memory.
B. Neutrophil
C. Lymphocyte
D. Basophil
Which of the following laboratory values indicates D. WBC = 14,000/mm³
leukocytosis?
Explanation: Leukocytosis is defined as an elevated white blood cell count, typically
A. WBC = 3,000/mm³ >10,000/mm³. A value of 14,000 meets this criterion and may indicate infection,
B. WBC = 6,000/mm³ inflammation, stress, or hematologic malignancy.
C. WBC = 9,500/mm³
D. WBC = 14,000/mm³
Which of the following best defines agranulocytosis? C. A marked decrease in granulocytes
A. A decrease in lymphocytes Explanation: Agranulocytosis is a severe reduction in granulocytes, which include
B. A marked decrease in all white blood cells neutrophils, eosinophils, and basophils. It significantly increases the risk of life-
C. A marked decrease in granulocytes threatening infections, especially when neutrophils are profoundly reduced.
D. A mild decrease in neutrophils only
Which of the following is NOT a common cause of C. Chemotherapy
leukocytosis?
Explanation: Leukocytosis (WBC >10,000) can result from infection, inflammation, tissue
A. Acute infection damage, stress, or medications like corticosteroids. Chemotherapy, on the other hand,
B. Corticosteroid use typically causes bone marrow suppression leading to leukopenia, not leukocytosis.
C. Chemotherapy
D. Tissue necrosis
GUIDE, PRACTICE QUESTIONS AND
ANSWERS
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep
,A 35-year-old man undergoing chemotherapy for lymphoma C. Low WBCs impair the inflammatory response
presents with fever and chills for the past 24 hours. He has no
cough, urinary symptoms, or abdominal pain. CBC reveals Explanation: In patients with severe leukopenia, especially neutropenia, signs of
WBC 1,000/mm³ (low). On physical exam, he is febrile to inflammation (redness, pus, swelling) may be blunted or absent, even in the presence of a
101.9°F but otherwise unremarkable. Which of the following serious infection, due to the lack of immune cells to mount a visible response.
best explains the absence of localized signs of infection?
A. Infection is viral in nature
B. Chemotherapy induces thrombocytopenia
C. Low WBCs impair the inflammatory response
D. The fever is a paraneoplastic syndrome
A 48-year-old woman presents for an annual physical with no A. Order B12, folate, and copper levels
complaints. She has no fever, weight loss, or recent illnesses.
Physical exam is unremarkable. As part of routine screening, a Explanation: In a patient with new-onset asymptomatic leukopenia and no concerning
CBC is ordered and reveals a WBC count of 3,000/mm³ (low). clinical features, the next appropriate step is to evaluate for reversible causes, such as
Differential shows a normal distribution of leukocyte subtypes. nutritional deficiencies (B12, folate, copper). Bone marrow biopsy is reserved for patients
What is the next best step in evaluating this new finding? with abnormal smear findings, pancytopenia, or symptoms concerning for malignancy.
Empiric antibiotics and corticosteroids are not indicated without evidence of infection or
A. Order B12, folate, and copper levels autoimmune disease.
B. Empiric antibiotics
C. Bone marrow biopsy
D. Start corticosteroids
What is the primary role of leukocytes in the human body? C. Defend against infection and remove cellular debris
A. Transport oxygen to tissues Explanation: Leukocytes (white blood cells) are part of the immune system. They defend
B. Promote blood clotting against pathogens and help clean up dead or damaged cells, mainly in the tissues.
C. Defend against infection and remove cellular debris
D. Regulate electrolyte balance
,Never Let Monkeys Eat Bananas types of leukocytes (in order of prevalance)
neutrophils (50-67%)
lymphocytes (24-40%)
monocytes (4-9%)
eosinophils (0-3%)
basophils (0-2%)
Which of the following leukocytes is classified as a C. Basophil
granulocyte?
Explanation: Granulocytes include neutrophils, eosinophils, and basophils—they contain
A. Lymphocyte visible granules in their cytoplasm. Lymphocytes and monocytes are agranulocytes.
B. Monocyte
C. Basophil
D. Macrophage
Which of the following best describes the typical lifespan of B. 1-10 days
granulocytes?
Explanation: Granulocytes (neutrophils, eosinophils, basophils) are short-lived cells,
A. Hours generally surviving 1-10 days, and are involved in acute immune responses.
B. 1-10 days
C. Weeks to months
D. Several years
Which of the following groups includes only phagocytic white B. Neutrophils, eosinophils, monocytes
blood cells?
Explanation: Phagocytes include neutrophils, eosinophils, monocytes, and basophils.
A. Neutrophils, lymphocytes, basophils Lymphocytes do not perform phagocytosis; they coordinate immune responses instead.
B. Neutrophils, eosinophils, monocytes While basophils are technically phagocytes, eosinophils and monocytes are more
C. Basophils, lymphocytes, monocytes prominent in that function.
D. Eosinophils, lymphocytes, macrophages
, Which of the following white blood cell types is most C. Lymphocyte
associated with long lifespan and memory immune
responses? Explanation: Lymphocytes (especially memory B and T cells) are agranulocytes with long
lifespans, sometimes lasting months to years, which allows them to retain immunologic
A. Eosinophil memory.
B. Neutrophil
C. Lymphocyte
D. Basophil
Which of the following laboratory values indicates D. WBC = 14,000/mm³
leukocytosis?
Explanation: Leukocytosis is defined as an elevated white blood cell count, typically
A. WBC = 3,000/mm³ >10,000/mm³. A value of 14,000 meets this criterion and may indicate infection,
B. WBC = 6,000/mm³ inflammation, stress, or hematologic malignancy.
C. WBC = 9,500/mm³
D. WBC = 14,000/mm³
Which of the following best defines agranulocytosis? C. A marked decrease in granulocytes
A. A decrease in lymphocytes Explanation: Agranulocytosis is a severe reduction in granulocytes, which include
B. A marked decrease in all white blood cells neutrophils, eosinophils, and basophils. It significantly increases the risk of life-
C. A marked decrease in granulocytes threatening infections, especially when neutrophils are profoundly reduced.
D. A mild decrease in neutrophils only
Which of the following is NOT a common cause of C. Chemotherapy
leukocytosis?
Explanation: Leukocytosis (WBC >10,000) can result from infection, inflammation, tissue
A. Acute infection damage, stress, or medications like corticosteroids. Chemotherapy, on the other hand,
B. Corticosteroid use typically causes bone marrow suppression leading to leukopenia, not leukocytosis.
C. Chemotherapy
D. Tissue necrosis
