Allergens
This image shows an example of an allergic response to ragweed pollen. On first exposure to an allergen, an IgE antibody is synthesized by plasma cells in response to a harmless antigen. The IgE molecules bind to mast cells. On secondary exposure, the mast cells release histamines and other modulators that affect the symptoms of allergy.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Disruptions in the Immune System. October 17, 2013."
http://cnx.org/content/m44831/latest/Figure_42_04_01.jpg
OpenStax CNX
CC BY 3.0.
