These in turn are influenced by the feedback from different parts of the body. SUMMARY The immune is a collection of cells that keeps a note of the pathogens that invade and it is able to destroy them. This makes the body immune to that disease. The immune system is responsible for warding of infection through the infection fighting cells and chemicals. References 1.
The Immune System The Immune System is a group of cells, molecules, and organs that act together to defend against disease. The body depends on the immune system to seek and destroy bacteria or viruses that could cause harm. There are two types of immunity: innate and adaptive. Innate is the body's first line of a defense against the disease. The innate immunity helped by barriers such as skin, tears, mucus, saliva, and infection.
Th2 cells, on the other hand, produce IL-4, IL-5, IL-6, and monitor the IgG1 and IgE isotype switching and mucosal immunity, stimulation of mast cells and eosinophils growth, and IgA synthesis. Thus, Th1 cells are contributing the basis of cell-mediated inflammatory reaction while Th2 cells help in humoral immune responses- the antibody-antigen and allergic reactions. Actions of Th cells populations are interconnected, activation of one subset will inhibit anothers. T cells can also be primed by some mitogenic substances such as PHA (phytohaemagglutinin) or concanavalin–A, regardless of their antigen specificity.
Monocytes are the precursors for macrophages; these monocytes migrate and differentiate into tissue macrophages once they encounter an infection. Macrophages are distributed around the w... ... middle of paper ... ...al, anti-parasitic as well as anti-tumor activities. Macrophages play an important role in the defence against tumours. This defence is achieved by the rapid response, the production and secretion of various cytokines that target the activation of dendretic cells (DC) and natural killer cells (NK). INF-y is the main cytokine that drive NK to stop the progression of tumour, and NK cells to activate the T cells to respond to the danger (Lamagna et al.
Stress And The Immune System The immune system is a very important part of our bodily functions as its main function is to protect the body against millions of antigens, which attack our cells and try to reproduce viruses and diseases. The immune system can protect the body in three different ways, in which are: 1. It creates a barrier that prevents the antigens from initially entering the body. 2. If the antigens do manage to enter the body, then your immune system will try to detect the virus and abolish it before it begins to spread.
The Immune System The immune system is a group of cells, molecules, and tissues that help defend the body against diseases and other harmful invaders. The immune system provides protection against a variety of potentially damaging substances that can invade the body. These substances include disease-causing organisms, such as bacteria, fungi, parasites, and viruses. The body's ability to resist these invaders is called immunity. A key feature of the immune system is its ability to destroy foreign invaders while leaving the body's own healthy tissues alone.
As a part of this third line of defense, it involves antibodies, along with lymphocytes called T cells and B cells (Joanne M. Willey, 2014). They change to handle a particular microbe (Joanne M. Willey, 2014). Foreign substances that start up an immune response are called antigens (Joanne M. Willey, 2014). The presence of external antigens causes B and T cells to replicate and make more proteins that function to protect the host (Joanne M. Willey, 2014). The B cell is most important because it produces and secretes antibodies.
Systematic Lupus Erythematosus (SLE) is a very serious and mysterious disease affecting the immune system. The immune system is designed to protect against foreign substances such as viruses, bacteria, and germs that have infiltrated the body. The immune system has an innate component and an adaptive ability that allows it to produce cells specially designed to destroy foreign or “non-self” substances. The adaptive immune system has two main cells, B cells and T cells. There are different types of T cells, cytotoxic, helper, regulatory, and natural killer T cells.
This defense involves immunity that the body has already developed against a specific foreign pathogen, such a virus or pet dander. This defense steps in when the second response is unable to take of the infection and it beginning to spread out. The third response uses the same cells such as Macrophages, Helper T cells, Cytotoxic T cells, and B cells. In addition to those cells specific response also uses effector cells and memory cells. Effector cells search and destroy foreign pathogens.
Once a bad cell has been recognized our bodies sends cells to destroy the damaged cell and prevent the spread of whatever caused the damage in the first place. The next step our body takes is to have the affected cells start to produce interferons and other helpful substances. These help to fight off unwanted organisms, and also to warn other cells of the invaders and prepare them to resist them therefore preventing the spread of disease. How did we discover them and what kinds are there? Interferons were first discovered as a result of their ability to prevent viral replication, by Alick Issacs.