Lymphocytes are a type of non-granular leukocyte. Which term describes this broad category?

• A. Monocytes
• B. Granulocytes
• C. Erythrocytes
• D. Non-Granular Leucocytes

Answer: (D)

Classification of white blood cells by whether they have cytoplasmic granules is the idea here. Lymphocytes are non-granular leukocytes, meaning they belong to the group of white blood cells that lack visible granules. The broad term that describes this category is non-granular leucocytes, which also includes monocytes. Granulocytes, by contrast, have cytoplasmic granules and include cells like neutrophils, eosinophils, and basophils, so they aren’t the broad category described. Erythrocytes are red blood cells and are not leukocytes at all. So the best term for this broad category is non-granular leucocytes.