Essay On Adaptive Immunity

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Immunity is when a person is in a state of being resistant to a particular pathogen. The two types of defense are innate immunity and adaptive immunity. Innate immunity is the defenses present at birth and always present to protect us against diseases. Innate immunity does not have a memory response but helps to prevent microbes from gaining access to the body and helps to eliminate those that enter the body. An example of the first line of defense is intact skin and an example of the second line of defense is fever. In an immunologically naïve host, viruses attach to the host cells (Tortora, & Funke, 2013). Adaptive immunity is slower to respond than innate immunity it does have a memory component is a function of the immunological system. The immunological system is able to recognize specific antigens and react in such a way that the host generates antibody-mediated immunity (AMI), cell-mediated immunity (CMI), or both. Adaptive immunity is the body’s third line of defense. An example is lymphocytes (T cells and B cells). Adaptive immunity is divided into two active immunity and passive immunity. In active immunity the body produces his…show more content…
Inflammation may be acute or chronic. It is a result of a response to an injurious agent such as microbes and allergens. Inflammation also repairs or replaces tissue damaged by injurious agent. Signs of inflammation include tumour or swelling.
Antigens are foreign proteins and other chemicals, which bind to antibodies and infection. The molecules, which lead to the production of anti-substances are usually known as antigens, and each antigen has a specific combining affinity for its corresponding anti-substance. In the first group, the anti-substance simply combines with the antigen, without producing any change in it. In the second group, in addition to combining with the antigen, it produces some recognizable physical change in it; examples are the precipitins and
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