Microscopically, which of the following cells have large, dark, blue-black granules and contain histamine?
A) Lymphocytes
B) Basophils
C) Eosinophils
D) Monocytes

Question

Quizplus · Accepted Answer

The basophil has large, dark, blue-black granules. It contains histamine, which mediates the inflammatory response, and heparin, which helps prevent excessive clotting of blood. Eosinophils have large red granules. They are phagocytic and closely associated with allergies (e.g., hay fever) and with asthma. Lymphocytes are the second most numerous type of WBC in adults. In children they usually are the most numerous. "Lymphs," as they are commonly called, are responsible for recognizing foreign antigens and producing circulating antibodies for immunity to disease. Monocytes are the largest type of WBC in circulation. Monocytes are called macrophages when they enter tissues and ingest bacteria and debris of cellular breakdown.

Microscopically, Which of the Following Cells Have Large, Dark, Blue-Black