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What role do memory cells play in immunity?
no
What immunity results when millions of memory b cells remain in the body?
Memory b cells provide long term immunity for a specific disease or antigen. As an example a vaccination for hepatitis A provides memory b cells that will attack the disease when it is present and remove it.
Explain the role of memory cells in the immune system?
Memory cells divide into plasma cells that produce the right antibody.
What do vaccines produce?
Immunity via the production of long lived memory lymphocyte cells in the immune system.
What type of white blood cells plays a major role in immunity to infectious diseases?
Lymphocytes
Functions of lymphocytes?
Lymphocytes have a <protective role>. Particular function depends on the type of lymphocytes. T cells are involved in cell-mediated immunity whereas B cells are primarily responsible for humoral immunity (relating to antibodies). Protective functions are done through: lysis of virually infected cells or tumor cells, realease of cytokines and growth factors to stimulate otherimmune cells, immunoregulation and cytotoxicity, destruction of virally infected cells, secretion of antibodies
Adaptive immunity is produced by which cell?
There are many cells involved in adaptive immunity and requires them to work together for a fully functional adaptive response. These cells include: CD4 (Th1 & Th2) T cells, B cells (plasma and memory), professional antigen presenting (APC) cells that include: dendritic cell, B cells and macrophages.
What is the medical term meaning type of immunity where memory cells are formed?
Adaptive Immunity is the type of immunity that creates memory cells. This is a specific type of immunity that reacts to the "non-self" antigen of pathogens. In the initial or first introduction to the pathogen, Immunoglobulin M (IgM) predominates the circulation. But in thesubsequentintroduction of the same pathogen where in memory cells were already formed from the previous event, Immunoglobulin G (IgG) now predominates. These antibodies either neutralize pathogens directly, or signals the complement system and/or the Natural Killer cells to eliminate the pathogen.Since memory cells are already formed, the body is better equipped in dealing with the same pathogen the second time around.This is the same concept in vaccinations, wherein we introduce into the body the same pathogen but in a weakened form removing it's virulence.
Immunity uses helper cells and killer cells to identify and destroy abnormal cells?
Cellular immunity uses helper cells and killer cells to identify and destroy abnormal cells.
What type of immunity has the properties of specificity and memory?
Acquired immunity (also known as adaptive immunity) This immune reaction is quite fast due to the immune memory.
Passive immunity does not last as long as active immunity?
Active Immunity is subdivided into two.First, the Natural Active Immunity which last a lifetime because our memory T-cells recognized the pathogen in our first exposure thus it was able to make anti-bodies againts it.Second,the Artificial Active Immunity which is commonly introduced to us by meas of vaccine.Examples of these are BCG,DPT,Hepatitis Vaccine,Tetanus Toxoid and OPV,these vaccine may contain LAM(Live Attenuated Microorganism) or dead microorganism that are being introduced to our body artificially that leads to activation of memory T-cells to also form anti-bodies, on the other hand it does not protect us for a lifetime.Serum Levels must be obtained and a booster shot is suggested in Hepatitis Vaccine after four years from the last dose recieved.
Which part of the immune system can most effectively eliminate influenza virus that has infected body cells?
We call this type of immunity adaptive---> natural----> active immunity. Here how it works: Adaptive immunity involves two classes of lymphocyte: B cells and T cells which work together in a coordinated system of adaptive immunity B cells-antibody-mediated (humoral) immunity T cells-cell-mediated (cellular) immunity Adaptive immunity occurs in a series of stages 1. Recognition of antigen (flu virus) 2. Activation of lymphocytes 3. Effector phase (immune attack) 4. Decline of antigen causes lymphocyte death (homeostatic balance) 5. Memory cells remain for later response if needed
