Immunity question

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What is the difference between cell mediated and humoral immunity?

please help

Posted Tue 1st January, 2013 @ 22:53 by mariah
Edited by mariah on Tue 1st January, 2013 @ 22:53

3 Answers

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Hi I was just revising this yesterday lol. But all it is that cell mediated response starts off straight after phagocytosis and  is with t lympocytes which get to the phagocyte where the displaying antigens are at and makes cytokines to produce more t helper cells and t killer cells( to kill own cells that been infected)and also trigger the humoral response. Humoral immunity involves b lymphocytes which basically make clones either plasma cells or memory cells the difference is plasma cells destroy any pathogens straight away and only last a few days, whereas memory cells can last over many years.

Answered Tue 1st January, 2013 @ 23:26 by Mohammed Ali
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How can i remember the process of phagocytosis easily

Answered Tue 1st January, 2013 @ 23:30 by mariah
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I learnt it just by looking at a diagram. Basically there are 5 steps.

  1. Pathogen releases toxins, this attracts the phagocyte so therefore the phagocyte goes down the concentration gradient (low to high)
  2. Phagocyte engulfs the pathogen and forms a vesicle around it, this is now a phagosome
  3. Lysosomes containing digestive enzymes enter the phagosome and release their enzymes.
  4. Enzymes kill pathogen and the phagosome is then removed by exocytosis
  5. The pathogen now displays the antigens of the pathogen.

Tip: Step 5 is where the T lympocytes begin to do their thing.

Hope I have helped.

Answered Tue 1st January, 2013 @ 23:44 by Mohammed Ali