Chapitre 24
Système immunitaire
Qu'est-ce que le système immunitaire ?
Overview
The immune system comprises diverse biological structures and processes that protect the body from disease. These processes can be classified ...
Réponses immunitaires à médiation cellulaire
Overview
The cell-mediated immune system is the host’s primary response against invasive bacteria and viruses that cause intracellular infections. ...
Réponses immunitaires humorales
Overview
The humoral immune response, also known as the antibody-mediated immune response, targets pathogens circulating in “humors,” or ...
Structure des anticorps
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced ...
Affinité et avidité
Overview
Antibodies bind to toxins or substances on the surface of cells, bacteria, viruses, or fungi. The substance is called an antigen, and the ...
Réactivité croisée
Overview
The ability of a single antibody to recognize multiple structurally similar epitopes is an important immune defense strategy that enables the ...
Réactions allergiques
Overview
We speak of an allergy when the immune system triggers a response against a benign foreign structure, like food, pollen or pet dander. These ...
Inflammation
Overview
In response to tissue injury and infection, mast cells initiate inflammation. Mast cells release chemicals that increase the permeability of ...
Vaccinations
Overview
Vaccination is the administration of antigenic material from pathogens to confer immunity against a specific microorganism. Vaccination primes ...
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