Immune System Flashcards
what are the 3 types of white blood cells?
macrophages, T lymphocytes, and B lymphocytes
What is the function of a macrophage
to alert T cells of the presence of bacteria
what is the function of a T lymphocyte
directly attack cells infected by bacteria
function of a B lymphocyte
target specific bacteria for destruction
two types of immune responses
Antibody mediated - response is to an antigen
Cellmediated - when response is to an already infected cell
what is the purpose of memory cells
to help the body remember previous pathogens, and counterattack even stronger the 2nd time
where are white blood cells produced
red bone marrow
what are the 5 types of leukocytes
monocytes, T lympocytes, B lymphocytes, granulocytes, natural killer cells
what is a macrophage
larges, longest living phagocyte that engulfs and destroys pathogens
what is a dendritic cel
present antigens to the T cells
Function of a neurophil
short living phagocytes that repsond quickly to invaders
Function of basophils
alert the body of invasion
function of eosinophils
large, long living phagocytes that defend against multicellular invader
Types of T lymphcytes
T killer cells, T helper cells, T suppressor cells, and T memory cells
Function of T killer cell
destory cells that are infected with a virus, tumor or pathogen
function of suppressor T cell
to stop or suppress the other T cells when the battle is over
function of helper T cells
help the body fight infections by producing antibodies and other chemicals
Function of memory T cells
remain in the blood to alert in case the invader attacks again
function of B lymphocytes
produce antibodies
describe the immune response
a pathogen enters the body and is engulfed by a macrophage, a helper T cell joins that macrophage. The killer T cells and B cells are activated. killer T cells search out and destroy cells presenting the same antigens, B cells afterwards differentiate into plasma cells and memory cells
Function of plasma cells
produce antiboides specific to that pathogen or foreign substnace