There are four different types of hypersensitivities. Type I Hypersensitivities are mostly Allergies and they are exaggerated, misdirected expression of immune responses to an allergen (antigen). The severity of allergies can range from atopy (local allergy such as hay fever or Asthma) or anaphylaxis (a violent and potentially fatal reaction that leads to narrowing of the bronchial airways). Foods, drugs, pollen and bee stings can trigger these reactions and this kind of sensitivity can be transferable to normal people through serum antibody.
An immune response is based on the ability to distinguish molecules that are part of the body ("self") from those that are not ("nonself," or foreign). Such molecules that can elicit an immune response are called antigens.
Antigens incite the immune response by being processed and presented by antigen-presenting cells, such as dendritic cells, to T cells. Once presented, the antigens can activate specific immune responses, leading to the generation of memory cells and effector cells that target the antigen. Antigens that are not processed, reduced, or combined with other proteins may not effectively stimulate the immune system.
HLA1 and HLA2 are located on chromosome 6 in the human genome. They encode proteins that play a key role in the immune system by presenting antigens to T cells for immune responses.
Adaptive immune responses combat a wide range of microbes, including bacteria, viruses, fungi, and parasites. The adaptive immune system can generate specific responses tailored to each type of microbe, leading to targeted and long-lasting protection against future encounters.
Antiviral immunity targets viruses by recognizing viral antigens and activating immune responses specific to viral infections. Antibacterial immunity targets bacteria by recognizing bacterial antigens and activating immune responses specific to bacterial infections. The mechanisms of immune cell activation, the types of cells involved, and the specific responses generated differ between antiviral and antibacterial immunity.
Allergies
antigens
An immune response is based on the ability to distinguish molecules that are part of the body ("self") from those that are not ("nonself," or foreign). Such molecules that can elicit an immune response are called antigens.
Fever, Inflammatory myopathies, and vitamin A deficiency.
Regulatory T cells are activated by recognizing specific antigens presented by other immune cells. Once activated, they suppress excessive immune responses to prevent autoimmunity and maintain immune tolerance. They play a crucial role in controlling inflammation and preventing immune reactions against self-tissues.
They're abnormal immune responses - by definition, an allergy is an inappropriate response to a foreign substance. After all, it's not known as an 'allergy' when people's immune systems attack harmful pathogens, despite the body mounting somewhat similar immune responses.
Histocompatibility antigens, also known as human leukocyte antigens (HLAs), help the immune system recognize and distinguish between self and non-self cells by serving as markers on the surface of cells. These antigens play a crucial role in immune responses by allowing the immune system to identify and target foreign invaders while avoiding attacking the body's own cells.
Antigens are important because they trigger responses to pathogens by the immune system. Without them, no prevention against pathogens would take place.
Antigens incite the immune response by being processed and presented by antigen-presenting cells, such as dendritic cells, to T cells. Once presented, the antigens can activate specific immune responses, leading to the generation of memory cells and effector cells that target the antigen. Antigens that are not processed, reduced, or combined with other proteins may not effectively stimulate the immune system.
HLA1 and HLA2 are located on chromosome 6 in the human genome. They encode proteins that play a key role in the immune system by presenting antigens to T cells for immune responses.
in order for antigens to incite the immune response the y must be ?
Adaptive immune responses combat a wide range of microbes, including bacteria, viruses, fungi, and parasites. The adaptive immune system can generate specific responses tailored to each type of microbe, leading to targeted and long-lasting protection against future encounters.