BISC300 Chapter Notes - Chapter 33: Complement Membrane Attack Complex, Pattern Recognition Receptor, Agranulocyte

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33. 1: immunity arises from innate resistance and adaptive. The immune system is composed of widely distributed proteins, cells, tissues, and organs that recognize foreign substances, including microorganisms. Together they act to neutralize or destroy them, maintaining host integrity. immune system: the defensive system in an animal consisting of the innate and adaptive immune responses. It is composed of widely distributed cells, tissues, and organs that recognize foreign substances and microorganisms and acts to neutralize or destroy them. They provoke immune responses and are also called immunogens (immunity generators): antigens: a substance (such as a protein, nucleoprotein, polysaccharide, or sometimes a glycolipid) to which lymphocytes respond. Importantly, a variety of white blood cells (leukocytes) function in both innate and adaptive immunity: white blood cell (wbc): blood cell having innate or acquired immune function. These cells are named for the white or buffy layer in which they are found when blood is centrifuged.

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