The innate immune system serves as a first-line defense, responding to infections almost immediately after a pathogen makes its way into the body. This response is carried out in two major ways: the cell can amplify the message that the body has been invaded, triggering an inflammatory response to recruit other cells to help fight off the pathogen, or the cell can undergo programmed cell death in order to stop the spread of infection and perhaps even release signaling molecules that alert neighboring cells to the presence of an invader.
↧
