8.1 immune system Flashcards

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1
Q

First line of defence

A

Designed to prevent entry of the pathogen into the body. Skin, Tears, Saliva, stomach acid, mucus

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2
Q

Second line of defence

A

-Uses nonspecific responses
fever: heats the body to weaken or kill the pathogen

inflammation: Blood stream directs more white blood cells to the effected area to kill the pathogen

phagocytosis: sends phagocytes to engult and kill the pathogens.

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3
Q

The third line of defense

A
  • Takes a few days to react
  • Sends B cells to identify and mark the pathogen
  • B cells create antibodies with a matching marker
  • Once the antibody binds with the pathogens, B cells release millions of antibodies to help fight off the pathogens
    -After the pathogen is defeated the B cells remain in the blood which creates memory cells
    -Immune to future attacks of the same pathogen
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4
Q

Vaccination

A

-Vaccines are made of dead/inactive pathogens.
-The pathogens trigger the 3rd line of defense and build memory without making us dangerously sick.

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5
Q
A
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