Chapter 22 Flashcards
What changes do cytokines cause?
An increase in blood flow and white blood cells accumulate at site of infection
What is clonal selection theory?
Antigen binding leads to repeated lymphocyte division resulting in a clonal population of lymphocytes
What are the 2 types of lymphocytes?
T and B
How do t lymphocytes distinguish between self and non self?
They have specific surface proteins that allow them to distinguish between the surface molecules of the body’s own cells and cells with foreign molecules on their surface
What chemical is released by damaged or invaded cells?
Cytokines
What is an antigen?
Any foreign molecule that is recognised by and able to elicit a specific response from a lymphocyte
What is an antibody?
A y shaped protein molecule which bear receptors that bind to a particle last antigen
What are the two types of t lymphocytes?
T helper and cytotoxic T cells
What do helper T cells do?
Secrete cytokines which activate phagocytes, tc cells and B cells
What do Tc cells do?
Destroy infected cells by several methods including apoptosis
What do B cells do?
Produces antibodies that are specific to one antigen and bind with it creating an antigen-antibody complex
