Immune System (Reversed) Flashcards
pre-programmed defense responses
Define innate immunity
-Skin and mucus-Oil, sweat (low skin pH)
List the barrier defenses
macrophages, interferons, inflammatory response, mast cells, natural killer cells
List the types of internal Defense
engulf pathogens
What do macrophages do?
proteins secreted by infected cells that signal neighboring cells to defend themselves.
What are interferons?
pain and swelling that occur upon injury or infection
Describe inflammatory response
histamines
Mast cells hold ________.
cause blood vessels to dilate, bringing extra blood which causes swelling in the tissues
What do histamines do?
phagocytes to come and help deal with the infection
Swelling in the tissues attracts what to do what?
destroy infected or cancerous cells
What do natural killer cells do?
a defense response that is enhanced by previous exposure to the pathogen
Define acquired immunity
Lymphocytes
White blood cells are also called what?
bone marrow
B – cells mature where?
thymus
T- cells mature where?
infection; job
White blood cells fight _______, but each has a specific ___.
antigen, antigen receptors, antibody / immunoglobulin, Major histocompatibility complex (MHC)
List the factors of recognition
a foreign molecule that is recognized and gets a response from lymphocytes
Describe antigen
lymphocytes
Antigen receptors are found on _________.
epitopes
Antigen receptors recognize the __________ of antigens.
a soluble form of the antigen receptor that can be secreted by the B-cell
What is antibody / immunoglobulin (Ig)?
an infected cell protein that displays a fragment of the antigen for white blood cells to recognize.
What is major histocompatibility complex (MHC)
found in most cells, and calls cytotoxic T-cells that use toxins to kill the infected cell
Describe MHC Class 1
found in dendritic cells and macrophages, which are called antigen presenting cells. They use Class II MHC’s to call helper T- cells that assist other lymphocytes.
Describe MHC Class 2
cloning of lymphocytes in response to a binding an antigen
Describe clonal section