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| Innate immunity: This is the first line of body defense against pathogens. It is immediate but nonspecific. While adaptive immunity mounts a very specific response to a given pathogen, innate immunity provides a generalized, immediate response to a spectrum of invaders: it includes physical barriers, cellular responses, and many chemical mediators. First, most invading pathogens will be repelled by general barriers of the body, mainly skin and mucous membranes. Well, the skin has been known to be a very efficient barrier since the mucous membranes trap and expel the causative agents from the respiratory, gastrointestinal, and urogenital tracts. Most cell-based responses require more than one type of immune cells, including macrophages, neutrophils, and natural killer (NK) cells. While macrophages and neutrophils are a class of phagocytic cells that ingest and digest material pathogenic, NK cells destroy the infected or cancerous cells through apoptosis. Chemical mediators play a very crucial role in natural immunity. For example, there exist antimicrobial peptides called defensins, and also lysozyme – an enzyme that breaks the cell walls of microbes. The complement system is a group of proteins existing in the fluid of the blood. It supports the elimination of microbes and dead cells and amplifies the inflammation; it eventually attacks the plasma membrane of the microbe. Strong innate immunity response. Tissue injury or infection leads to an increase in blood delivery to the area due to inflammation, directly in a short time because of cytokines released from immune cells and other signaling molecules so as to get more immune cells on site to fight and initiate healing processes. |
Innate Immunity Online Quiz
By presenting 3 options to choose from, Innate Immunity Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Innate Immunity Questions and Answers and click over the correct answer.
- Test Name: Innate Immunity MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Innate Immunity Flashcards
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