Microbiology 2117 immunity study Questions and
Answers 100% Correct
What are the 3 lines of defense?
1) mechanical
2)white blood cells (phagocytosis, inflammation)
3) B and T cells
what does immune system do?
1) surveillance of the body
2) recognition of foreign material
3) destruction of entities deemed to be foreign
white blood cells
leukocytes. innate capacity to recognize and differentiate any foreign material.
lymph
extra cellular fluid that returns circulation though a series of vessels
nonself
foreign material. not supposed to be there.
self
normal cells of the body
innate, natural defenses
are present at birth, provide nonspecific resistance to infection
, adaptive immunities
are specific, must be acquired. specific and memory.
first line of defense
any barrier that blocks invasion at the portal of entry-nonspecific
second line of defense
protective cells and fluids; inflammation and phagocytosis - nonspecific
third line of defense
acquired with exposure to foreign substance; produces protective antibodies and creates memory
cells - specific
examples of first line of defense
tears, stomach acid, sweat glands, skin shedding
lysozyme
an enzyme that hydrolyzes the cell wall of bacteria, in tears
nonspecific chemical defenses
lysozyme, acid/low pH, bile, semen has antimicrobial chemical, vagina pH is acidic, high lactic
acid and electrolyte concentration in sweat
A) white blood cells
which of the following is NOT an example of a first line defense?
Answers 100% Correct
What are the 3 lines of defense?
1) mechanical
2)white blood cells (phagocytosis, inflammation)
3) B and T cells
what does immune system do?
1) surveillance of the body
2) recognition of foreign material
3) destruction of entities deemed to be foreign
white blood cells
leukocytes. innate capacity to recognize and differentiate any foreign material.
lymph
extra cellular fluid that returns circulation though a series of vessels
nonself
foreign material. not supposed to be there.
self
normal cells of the body
innate, natural defenses
are present at birth, provide nonspecific resistance to infection
, adaptive immunities
are specific, must be acquired. specific and memory.
first line of defense
any barrier that blocks invasion at the portal of entry-nonspecific
second line of defense
protective cells and fluids; inflammation and phagocytosis - nonspecific
third line of defense
acquired with exposure to foreign substance; produces protective antibodies and creates memory
cells - specific
examples of first line of defense
tears, stomach acid, sweat glands, skin shedding
lysozyme
an enzyme that hydrolyzes the cell wall of bacteria, in tears
nonspecific chemical defenses
lysozyme, acid/low pH, bile, semen has antimicrobial chemical, vagina pH is acidic, high lactic
acid and electrolyte concentration in sweat
A) white blood cells
which of the following is NOT an example of a first line defense?
