antigen
antigens
If it can be harmful, it can be referred to as pathogen.
lymphokine
pathogen
The body usually forms antibodies in response to invasion by a foreign material.
cholesterol
antigen- any substance the body regards as foreign
If it can be harmful, it can be referred to as pathogen.
One term that is used is antigen. An antiGEN will GENerate an ANTIbody which will 'kill' the antigen.
A foreign substance is a substance that doesn't belong somewhere. A piece of glass or splinter is a foreign substance that people get in their body.
A foreign substance is a substance that doesn't belong somewhere. A piece of glass or splinter is a foreign substance that people get in their body.
antigen
lymphokine
pathogen
The body usually forms antibodies in response to invasion by a foreign material.
The body can reject implants and, of course, blood if it's not your own type or O negative (I think). You can look at allergies the same way - hay fever, nuts, strawberries - the body detects them as harmful even though they are harmless.
Antigenan·ti·gen/ˈantijən/Noun:A toxin or other foreign substance that induces an immune response in the body, esp. the production of antibodies.
When a foreign substance enters the body.