Qualification > Sciences
Human BiOlogy.
Deadly_king:
--- Quote from: -L- on October 02, 2010, 06:02:04 pm ---Please explain, the four types of immunity
Active artificial immunity,
Active natural immunity,
Passive artificial immunity,
Passive natural immunity.
Or is there more? These were the four mentioned in the past papers.
--- End quote ---
Nope these are the only types. I mean there are only 4 types pf immunity.
First you need to differentiate between natural and artificial.
Natural immunity occurs when the body itself produces antibody molecules for immune response.
Artificial immunity take place when we take in drugs and medicines which will lead to a drastic rise in the number of antibody molecules in the body.
Now differences between active and passive.
Active immunity occurs when you have been exposed to a particular disease and your body is preparing itself for defence. In other words it is taking all the appropriate measures to combat this new virus or bacteris.However takes more time as it produces memory cells for future use. Hence if the same virus affects us later on, our immune response will be faster due to the memory cells.
Passive immunity takes place when the body cannot actually do anything against this particular disease which is usually quite dangerous. Hence you take in drugs but this form of immunity is only temporary since the antibodies will be cleared by our immune system as it is foreign.
Sorry for the brief explanation. I'll elaborate more if you want when i get home :P
I hope i've not exceeded what's in YOUR syllabus ;)
If you want a better explanation follow this link :
http://www.biologymad.com/ -----> AS Biology ----> Immunology -----> Immunity
NOTE : Again this is for AS. Do not learn more than your syllabus ;)
iluvme:
Thank You Deadly King. :)
And yes I'd like a better explanation on Passive immunity.
Deadly_king:
--- Quote from: -L- on October 05, 2010, 12:00:24 pm ---Thank You Deadly King. :)
And yes I'd like a better explanation on Passive immunity.
--- End quote ---
Alright madam :)
But be attentive because this is not going to be as simple as you think it is!
Passive immunity takes place when a person is infected by a very dangerous disease. Hence medical practitioners prefer not to take any risk and inject some anti-toxins into the person's body. The anti-toxins provide immediate protection but this is only temporary because the antibodies have not been produced by own cells. Therefore they are regarded as foreign and will be removed in a matter of time by the mechanism of the person's body. But since the antibodies have come from the exterior it is regarded as artificial passive immunity.
When antibodies pass from mother to baby across the placenta or via breast milk, it is called natural passive immunity.
Hope you get what am trying to say :)
P.S : I modified my previous post. Do take a look. Might be helpful as well ;)
iluvme:
Righto Thanks.
I'll be back with more doubts after Friday. ;)
Deadly_king:
--- Quote from: iluvme on October 13, 2010, 09:08:30 am ---Righto Thanks.
I'll be back with more doubts after Friday. ;)
--- End quote ---
No problem.............just let me know........and i'll try my best to clear your doubts ;)
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