,
,Background and introduction
Antibodies: are proteins that binds to the antigen as part of the immune response
The immune system is our bodys way of detecting and dealing with foreign antigen. In order
to do this the way of recognising what is foreign is called self/non-self recognition. When a
non self antigen is detected it will trigger an immune response which may involve the
production of antibodies. The immune system can also recognise when our own cells become
a threat: when infected with a virus or when turned into a tumour itself which is known as self
recognition
What is immunity?
Is the ability of an organism to resist infection from invading disease causing microorganisms
(Pathogens). This may involve an immune response, which is the organism recognising and
responding to antigens and destroying substances carrying non-self antigens through the
activation of lymphocytes
·
, Quick recap
1.
Pathogens
Microbes that cause disease (bacteria, viruses, fungi, protozoa).
2.
Antigens
Proteins on cell surfaces that trigger an immune response.
Pathogens, foreign cells, or abnormal body cells have them.
3.
White Blood Cells (WBCs)
Phagocytes – engulf and digest pathogens (non-speci c).
Lymphocytes – speci c response:
B cells → make antibodies (humoral immunity).
T cells → kill infected cells & help B cells (cell-mediated immunity).
fi fi
,Background and introduction
Antibodies: are proteins that binds to the antigen as part of the immune response
The immune system is our bodys way of detecting and dealing with foreign antigen. In order
to do this the way of recognising what is foreign is called self/non-self recognition. When a
non self antigen is detected it will trigger an immune response which may involve the
production of antibodies. The immune system can also recognise when our own cells become
a threat: when infected with a virus or when turned into a tumour itself which is known as self
recognition
What is immunity?
Is the ability of an organism to resist infection from invading disease causing microorganisms
(Pathogens). This may involve an immune response, which is the organism recognising and
responding to antigens and destroying substances carrying non-self antigens through the
activation of lymphocytes
·
, Quick recap
1.
Pathogens
Microbes that cause disease (bacteria, viruses, fungi, protozoa).
2.
Antigens
Proteins on cell surfaces that trigger an immune response.
Pathogens, foreign cells, or abnormal body cells have them.
3.
White Blood Cells (WBCs)
Phagocytes – engulf and digest pathogens (non-speci c).
Lymphocytes – speci c response:
B cells → make antibodies (humoral immunity).
T cells → kill infected cells & help B cells (cell-mediated immunity).
fi fi
