Memory Lymphocytes and immunistaion

Question 1

Explain how an immune response works

Answer 1

a pathogen enters the body it has an antigen on the surface of it -unique/specific chemical molecules
the foreign antigen detected by white blood cell
a protein is produced by lymphocytes(white blood cell)called antibody, has complimentary shape to the specific antigen allows molecules to lock together to destroy or kill them by doing a chemical reaction
B-memory cells remember the specific antigen and antibodies made to do quicker response if it enters again.

Question 2

explain difference between 1st response and 2nd response

Answer 2

stronger faster no symptoms shown as more cells recognise it due to memory lymphocytes remain body for longtime

Question 3

what is immunisation/vaccinating?

Answer 3

injecting dead or inactive pathogens into body .Still carry antigens harmless but body still produces antibodies to destroy them.
Memory lymphocytes made -to cause a 2nd i response.

Question 4

What are the 2 pros and cons of Immunisation?

Answer 4

1. big outbreaks of diseases prevented if large %of population immunised.even if some not herd immunity
2. some diseases like smallpox virtually wiped out
3. doesn’t always work -no immunity
4. bad reaction swelling fever or seizure.rare.