Which of the following statements are true?
A. Eosinophils are the major, if not sole, source of histamine in the blood
B. Basophils are effector cells in allergic reactions by virtue of IgE receptors
C. Mast cells are the major source of tissue histamine except in the stomach and central nervous system
D. Mononuclear phagocytes release a variety of proinflammatory cytokines and growth factors
Answer:B
Which of the following statements are true?
A. Eosinophils are the major, if not sole, source of histamine in the blood B. Basophils are effector cells in allergic reactions by virtue of IgE receptors C. Mast cells are the major source of tissue histamine except in the stomach and central nervous system D. Mononuclear phagocytes release a variety of proinflammatory cytokines and growth factors