Can someone please explain cell mediated and hummoral immunity to me :'((

  • 0 votes

im going to cry if its in the exam tommorrow :((

Posted Tue 8th January, 2013 @ 18:17 by mariah

3 Answers

  • 1 vote

Cell mediated immunity is carried out by T lymphcoytes. They are made in the thymus gland (you don't need to know anything about the gland - just it's name). 

What happens is in phagocytosis, the phagocyte will present antigens on it's surface. A cell called a T helper cell will come along and bind to an antigen. Then it will remember the shape, and it will go to a T lymphocyte and activate it. The T lymphocyte then begins to divide and divide by mitosis. It will form memory cells - these remember the shapes of the antigens and will be able to cause a faster response the next time the pathogen is in the body. T killer cells are made which punch holes in the cell membrane of invaded cells. 

Now for B lymphocytes - these are the ones that deal with humoral immunity. Humoral which is just a fancy way of saying body fluids like the blood and tissue fluids. So the B lymphocytes will go around the fluids and they will pick up antigens. They will process them and stick them on the cell membranes. T helper cells will then bind to the antigens and activate the B cells. The B cells will then divide into plasma cells which produce antibodies and memory cells which will remmeber the antigens.

Hope this helps. Good luck.

Answered Tue 8th January, 2013 @ 18:28 by Tilly - Team GR
  • 1 vote

Cell mediated immunity is carried out by T lymphcoytes. They are made in the thymus gland (you don't need to know anything about the gland - just it's name). 

What happens is in phagocytosis, the phagocyte will present antigens on it's surface. A cell called a T helper cell will come along and bind to an antigen. Then it will remember the shape, and it will go to a T lymphocyte and activate it. The T lymphocyte then begins to divide and divide by mitosis. It will form memory cells - these remember the shapes of the antigens and will be able to cause a faster response the next time the pathogen is in the body. T killer cells are made which punch holes in the cell membrane of invaded cells. 

Now for B lymphocytes - these are the ones that deal with humoral immunity. Humoral which is just a fancy way of saying body fluids like the blood and tissue fluids. So the B lymphocytes will go around the fluids and they will pick up antigens. They will process them and stick them on the cell membranes. T helper cells will then bind to the antigens and activate the B cells. The B cells will then divide into plasma cells which produce antibodies and memory cells which will remmeber the antigens.

Hope this helps. Good luck.

Answered Tue 8th January, 2013 @ 18:29 by Tilly - Team GR
  • 0 votes

it does help thaanks,just hope i remember it now :)

Answered Tue 8th January, 2013 @ 18:32 by mariah