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immune system - (answers)complex body defines system- protects body against bacteria,
viruses, toxins and parasites
innate system - (answers)-present at birth
-not antigen specific
-present at all times
-does not improve with
repeated exposure to infectious agent
adaptive immune system - (answers)-develops throughout life
-antigen specific
-lag time between infection and response
-memory develops- provides lifelong immunity to reinfection
immune response - (answers)defend the life of the individual - by identifying foreign substances
in body and developing defence against them
,host response - (answers)The way that an individual's body responds to an infection
leukocytes - (answers)-act like independent single-cell organisms
-can move through tissues and capture micro-organisms on their own
-2 types important in perio disease: PMNs, Moncytes/macrophages
phagocytosis - (answers)process by which leukocytes engulf and digest microorganisms
polymorphonuclear leukocytes - (answers)(PMNs)
-neutrophils
- rapid responders- 1st line of defence
- capture/ destroy bacterial invaders
-short-lived
what attracts leukocytes to an infection site - (answers)PMNs are attracted to bacteria by
chemotaxis
lysosomes - (answers)strong bactericidal and digestive enzymes in PMN
-perio pathogens are effectively destroyed by PMNs
monocytes/macrophages - (answers)monocytes:in the bloodstream
, macrophages: in the tissues
-slower to arrive at infection site than PMNs
-surround/destroy bacteria
-long-lived cells in chronic inflammation
lymphocytes - (answers)small leukocytes- help defend body
2 types: B cells, t cells
B lymphocytes - (answers)B Cells
makes antibodies and pour into bloodstream
2 types: plasma/ memory b cells
antibodies - (answers)y shaped proteins
y binds w outside of b celll
-other end of y binds to a MO and kills it
antibodies - (answers)are known collectively as immunoglobulins
T lymphocytes - (answers)T cells