Which is not a granulocyte?

Appeared in: DHS Staff Nurse - 2018 (Shift-2nd)

Explanation

Leukocyte is the broad term for all white blood cells (WBCs).
Leukocytes are categorized into two main groups: granulocytes and agranulocytes.
Since 'Leukocyte' is the parent category that includes granulocytes, it is not a specific type of granulocyte itself.
The question asks what is 'not' a granulocyte, making 'Leukocyte' the correct answer because it's a higher-level classification.

Option A: Neutrophil is a type of granulocyte, characterized by the presence of fine, neutral-staining granules in its cytoplasm. It is the most abundant type of white blood cell.
Option C: Basophil is a type of granulocyte. It is characterized by large, coarse granules that stain blue with basic dyes and is involved in allergic reactions.
Option D: This option is incorrect because there is a correct answer among the choices. 'Leukocyte' is not a granulocyte; it is the general term for all white blood cells.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of Leukocytes as background academic context rather than a clinical decision trigger.
Understanding the different types of leukocytes is fundamental for interpreting a complete blood count (CBC) with differential, a common diagnostic test.
Abnormal levels of specific granulocytes can indicate different conditions. For example, high neutrophils (neutrophilia) often suggest a bacterial infection, while high eosinophils (eosinophilia) can point to parasitic infections or allergic reactions.
A nurse needs to monitor the differential WBC count to assess a patient's response to treatment, such as antibiotics for an infection or chemotherapy which can cause neutropenia (low neutrophils), increasing infection risk.

How to Approach the Question

First, understand the question's core concept, which is the classification of white blood cells (leukocytes).
The keyword 'NOT' is critical. You are looking for the option that does not fit the category of 'granulocyte'.
Recall or look up the definition of a granulocyte. Granulocytes are a specific category of leukocytes characterized by cytoplasmic granules.
Evaluate each option against this definition:
Is 'Neutrophil' a granulocyte? Yes, it's a primary example.
Is 'Leukocyte' a granulocyte? No, 'Leukocyte' is the general term for all white blood cells, a broader category that contains granulocytes.

Concept Tested & Keywords

Concept Tested: Classification of Leukocytes
Stem keywords: granulocyte, leukocyte, neutrophil, basophil
Lead-in keywords: not
Negative lead-in flag: The question asks to identify the option that is NOT a granulocyte.

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E6 Medicine Harrison 22e Part 1 p. 494-496

E6 Medicine Harrison 22e Part 2 p. 673-675

E6 Anatomy Grays 43e Vol 1 Part 1 p. 105-106

Practise the full DHS Staff Nurse - 2018 (Shift-2nd)

Attempt every question from this paper in a timed mock, then review the full solution for each one.