How the Immune System Works by Kaylee Munger https://padlet.com/90302750/y0e9jsarfw7z en-us 2018-05-21 18:25:08 UTC 2026-03-06 05:29:47 UTC hello@padlet.com Specific Defense - Third Line of Defense 90302351 https://padlet.com/90302750/y0e9jsarfw7z/wish/262471769 1. Macrophage identifies the virus (if it is a parasite, fungus, etc.)
2.T cells recognize virus and call for backup
3.B cells come and create Y cells which are the antibodies that tag the virus that need to be destroyed
4.K cells destroys all that was marked by the B cells
5.Memory cells watch for the virus. Remember what virus is and let cells know if it comes again.]]> 2018-05-21 18:38:29 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262471769 Non Specific Defense - First Line of Defense 90302750 https://padlet.com/90302750/y0e9jsarfw7z/wish/262473301 Consists of different types of barriers that keep out most pathogens. Pathogens are diseases such as bacteria and viruses. 

]]> 2018-05-21 18:42:30 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262473301 active immunity and passive immunity 90304832 https://padlet.com/90302750/y0e9jsarfw7z/wish/262473798 active immunity happens when an immune responds to a pathogen and makes a memory cell. active immunity can also occur when immunization happens. passive immunity is when antibiotics are given to a person who has never been exposed to the pathogen. ]]> 2018-05-21 18:43:34 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262473798 What Is the Immune System? 90302351 https://padlet.com/90302750/y0e9jsarfw7z/wish/262474938 The immune system is the body's defense against infectious organisms and other invaders. The immune system is made up of a network of cells, tissues, and organs that work together to protect the body.]]> 2018-05-21 18:46:57 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262474938 Immune Responses 90302351 https://padlet.com/90302750/y0e9jsarfw7z/wish/262475293 -B cells fight infections by making antibodies. An antibody is a large, Y-shaped molecule that binds to an antigen.
-There are different types of T cells, including killer T cells and helper T cells. Helper T cells activate the B cells and Killer T cells destroy infected, damaged body cells. When the killer T cell comes into contact with the infected cell, it releases toxins. Both the infected cell and the pathogens inside it are destroyed.]]> 2018-05-21 18:47:54 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262475293 Non Specific Defense - Second Line of Defense 90302351 https://padlet.com/90302750/y0e9jsarfw7z/wish/262475476 Breaking of the skin allows pathogens to be able to enter the body, the bacteria will enter the body's second line of defense. Signs of inflammatory response are skin becoming red and swollen. The is the first reaction the body has to tissue damage ]]> 2018-05-21 18:48:27 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262475476 Memory Cells 90302351 https://padlet.com/90302750/y0e9jsarfw7z/wish/262477089
-Most B cells and T cells die after an infection has been brought under control. These long-lasting B and T cells are called memory cells 

-Memory cells allow the immune system to “remember” a pathogen after the infection is over. If the pathogen invades the body again, the memory cells will start dividing in order to fight it. They will quickly produce a new “army” of B or T cells to fight the pathogen. So because of memory B and T cells, a secondary immune response is much faster than an primary immune response.

]]> 2018-05-21 18:53:13 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262477089 90304832 https://padlet.com/90302750/y0e9jsarfw7z/wish/262482363 2018-05-21 19:10:28 UTC https://padlet.com/90302750/y0e9jsarfw7z/wish/262482363