Hierdie Opsommings is opgemaak uit 4+ bronne. Kwartaal Biologie opsommings met belangrike sketse, belangrike konsepte en moeilike konsepte afgebreek in makliker en eenvoudiger woorde. Ek as 'n leerder het 83% verwerf vir Biologie met hierdie opsommings! Definitief die moeite werd..
, Imuunrespons:
Manier waarop organisme homself teen patogene viruses, bakterieë,
protosoë, of fungi beskerm.
Imuunrespons het 2 katogorieë:
Natuurlik:
- Teenwoordig by geboorte
- Eerste llinie van verdediging
- In staat om verskillende patogene te vernietig.
Vervorwe:
- Ontwikkel deur blootstelling aan patogene
- Indien Patogene deur eerste linie breek, word dit geaktiveer
- Witbloedselle vernietig patogene en voorkom herinfeksie
Imuunrespons by plante:
Word net soos diere as hulle deur patogene geïnfekteer word
Besit SLEGS natuurlike immuniteit
Passiewe Meganismes
Meganiese versperrings teen infeksies soos wasagtige katikulas, bas,
lignien, en suberien in hulle selwande hou patogene uit en vog binne
Skei ook irriteerende sappe af -> verhoed dat insekte en diere hulle eet.
Eeltweefsel : wonde in vaatplante wat toegestop word met
parenchiemselle.
Wanneer patogene binne palnt kom, stel hulle hoë vlakke silisielsuur vry
in geïnfekteerde weefsel.
Hierdie Silisielsuur bring seldood in geaffekteerde weefsel mee, wat
verspreiding en vermeerdering van patogene beperk.
Imuunrespons by Diere:
Diere het ‘n interne immuunstelsel vir beskerming teen patogene.
Natuurlik: Patogene groei beter by lae temperature!!!
Eerste linie van verdediging is gewoonlik eksterne versperrings.
Vel is dan jou eerste linie van verdediging
Wanneer patogene verby eerste linie kom kry jy koors en inflimasie
Koors en Inflimasie voorkom die vermeerdering en verspreiding van
patogeen.
Verworwe:
Immuunstelsel vervaardig leukosiete (witbloedselle) wat patogene
vernietig.
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