Summary Biology 11 Notes

Li
lived -
Immune
response :


pathogen .
Highly specific
·
attack on




Antigen non-living particle the body
: cannot recognize.
-

Body remembers already fought pathogen
(1) the Y antibodies
& produce
>
-
B cells :

recognize antigens present
-
used to fight antigens.
(2)
cells & killer
>
-
T :
helper

Helper activate Bells
pathogen &
recognize antigen
or
·




killer
B cells ,
antigen/pathogen wo
Recognize
&
destroy
Immune Response
:
recognition , mobilization , disposal ,
immunity
.

Prevention of Pathogens
-
Diseases are transmitted by :




>
-
Direct contact -


person-to-person
sexual contact ul infected
kissing , touching ,
or
~


~
coughing , sneezing , talking releases droplets algerme
>
-
Indirect contact
-
:

touching contaminated objects /surfaces

"Airborne transmission through
breathing
the in the air .
germs
> contaminated food &
-
water

animal waste
> Animal bites/scratches ,
handling
-




>
-
vector-borne : insect bites transmit diseases .