Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

Immunity = where the bodies defences seem better prepared for a second infection from the same pathogen and
can destroy it before it can cause any harm
...

There is a high probability that when a pathogen gets
into the body, one of these lymphocytes will have a
protein on its surface that is complementary to one of
the proteins of the pathogen = the lymphocyte recognises the pathogen
...
Others are more specific, less rapid but longer lasting
...
When an infection occurs, the one type already
These responses involve a type of white blood cell called a
present that has complementary proteins is stimulated
lymphocyte and takes two forms:
to divide to build up its numbers to a level where it
Cell-mediated responses involving T-Lymphocytes
can be effective in destroying it
...

Recognising your own cells:

The immune system recognises organ transplants as nonself material even though they come from individuals of the
Lymphocytes must be able to distinguish the bodies
same species so it attempts to destroy the transplant
...
If they couldn't do this, the lymphoally matched as closely as possible to those of the recipient
cytes would destroy the organisms own tissues
...

Each type of cell (self or non-self) has specific molecules on its surface that identify it
...

It is this variety of specific 3D structures that distinguishes
one cell from another

---