Immune system response. Artwork representing the activation of a T-lymphocyte cell (bottom right) due to the presence of a foreign cell (top left). Th

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Immune system response. Artwork representing the activation of a T-lymphocyte cell (bottom right) due to the presence of a foreign cell (top left). The activation requires two signals: the recognition of an antigen (yellow) by a receptor molecule (green) situated on the membrane of the lymphocyte and the release from the foreign body of the substance known as Interleukin-1 (magenta ellipsoids). Due to these messages the T-cell enlarges and starts synthesising RNA, proteins and Interleukin-2 (blue ellipsoids). A red Y-shaped molecule is being released to activate another part of the immune system. T-lymphocytes are white cells which circulate in the blood.

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Size: 4897px × 4961px
Photo credit: © KAIROS, LATIN STOCK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -cell, -lymphocyte, 2, activatio, activation, active, anatomy, antibody, antigen, artwork, body, human, immune, immunology, interleukin-1, production, response, system