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Histamine allergic reaction, diagram
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Histamine allergic reaction, diagram
Histamine allergic reaction. Diagram showing the process that leads to the release of histamine during an allergic reaction. Cells called mast cells (orange) mediate this response. When an allergy-prone person is first exposed to an allergen, antibodies (Y-shaped) are produced to defend against the allergen and these attach (at left) to the mast cells at receptors yellow, cup-shaped). The second time that person is exposed to the allergen, the allergen acts as an antigen (yellow spheres) and binds to the mast cells, prompting the release of histamine (white). It is the histamine overload that causes the symptoms of an allergic reaction
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6336960
© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY
Allergen Allergens Allergic Reaction Allergy Antibodies Antibody Antigen Antigens Cell Biology Cellular Defending Diagram Histamine Immune System Immunology Mast Cell Reacting Receptor Receptors Releasing Series Bio Chemistry Biochemical Condition Disorder
EDITORS COMMENTS
This print from Science Photo Library showcases the intricate process of a histamine allergic reaction. The diagram provides a detailed illustration of how mast cells, represented in orange, play a crucial role in mediating this response within the human body. When an individual with allergies is first exposed to an allergen, their immune system produces Y-shaped antibodies (depicted in yellow) as a defense mechanism against the foreign substance. These antibodies then attach themselves to receptors on mast cells (highlighted in yellow and cup-shaped). Upon subsequent exposure to the same allergen, it acts as an antigen - depicted as small yellow spheres - binding to the sensitized mast cells. This interaction triggers the release of histamine (shown in white), which leads to an overload of this chemical compound within the body. It is this excess histamine that ultimately causes various symptoms associated with allergic reactions. From sneezing and itching to hives and difficulty breathing, these manifestations can range from mild discomfort to severe complications. The photograph beautifully captures the biochemical duo between antigens and mast cells during an immunological reaction. It serves as both educational artwork for biology and medicine enthusiasts while providing valuable insights into how our immune system defends against harmful substances that trigger allergies.
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