Identify the cell at the arrow.

Identify the cell at the arrow.

• A. Basophil
• B. None of the Above
• C. Macrophage
• D. Neutrophil

Answer: (B)

The cell is best identified by its morphology on a stained smear. The arrow shows a cell with a large, round nucleus that fills most of the cell and only a small amount of cytoplasm, which is characteristic of a lymphocyte. Basophils would have many dark-staining granules and a lobed nucleus, neutrophils would have a multi-lobed nucleus with pale cytoplasm, and macrophages are larger with irregular shapes and abundant cytoplasm. Since the observed cell doesn’t match any of those features, None of the Above is the right choice.

The cell is best identified by its morphology on a stained smear. The arrow shows a cell with a large, round nucleus that fills most of the cell and only a small amount of cytoplasm, which is characteristic of a lymphocyte. Basophils would have many dark-staining granules and a lobed nucleus, neutrophils would have a multi-lobed nucleus with pale cytoplasm, and macrophages are larger with irregular shapes and abundant cytoplasm. Since the observed cell doesn’t match any of those features, None of the Above is the right choice.