Monday, March 3, 2014

What Are The Body'S Primary And Secondary Responses

Modern medicine can assist the body's natural defenses in fighting an illness.


The human body's primary and secondary responses refer to the immune system's ability to defend against foreign entities, such as disease, virus or bacteria. The primary response is the body's first line of defense, and the secondary response is the human body's last attempt to oust an invading entity.


Primary Response


As the first line of defense, the body triggers the primary immune response when a harmful antigen is detected. An antigen is a substance or molecule that, when introduced to the body, triggers the production of antibodies by the immune system. The antibodies then try to kill or neutralize the antigen identified as a dangerous or foreign entity. A lag period of 10 days to four week, occurs after the antigen enters the body before antibodies are produced and released.


Primary Response II


During the lag phase, B-lymphocytes prepare to do their sole job of dividing and producing antibodies, specifically designed to destroy harmful antigens. The antibodies will appear in the bloodstream and increase until they level off and slowly decrease when the original antigens are not present in the body. As the primary immune response progresses, the quality of antibodies will improve.


Secondary Response


The secondary immune response occurs after an antigen the body has previously encountered invades the body again. However, the antigen must be the same virus or bacteria and the same exact strain. An example would be a person being reinfected with the exact same flu. The body's previous antibodies created specifically for the strain of flu virus would increase without any lag perceiving the antigens as a greater threat.


Secondary Response II


After the antigen has been successfully killed off again, the body's antibodies will fall even lower than in the previous encounter. Only the most dominant antibodies will survive, and they will relax into memory mode, in case the exact strain of virus is ever encountered again.








Related Posts:




  • Change The Oil & Primary In A 2004 Harley Davidson Wide Glide

    In 2004, Harley Davidson delivered on a promise to go retro with the Wide Glide model of Harley's brand by including features like factory ape grip handle bars and saddle back design for its Wide...


  • Check Oil In A Harley Primary

    Keep up with your Harley-Davidson's motorcycle maintenance.Harley-Davidsons require regular maintenance just like any vehicle. To ensure your motorcycle runs properly, always perform regular maint...


  • Change The Primary Oil On An Hd Street Glide

    Your Harley-Davidson Street Glide depends on three separate oil types to transfer power from the v-twin motor to the pavement: engine oil, primary oil and transmission oil. While changing the engi...


  • Check Primary Oil On A 2003 Harley

    Unlike most motorcycles, Harley-Davidson's motors are composed of three separate components, consisting of the motor itself, the primary drive and the transmission. Each component requires its own...


  • Fill The Harley Davidson Primary With Oil

    Primary cover on a Harley-Davidson big twinChecking and maintaining the proper level of fluids in your Harley-Davidson is important. In addition to the engine and transmission, the primary case re...