SECONDARY DEFENCE - Human Protection

Question 1

what are the job of white blood cells

Answer 1

get rid of pathogens in tissues of body

Question 2

what are the two types of WBC we learn

Answer 2

Phagocytes and Lymphocytes

Question 3

what is the job of phagocytes

Answer 3

engulf pathogens in a vesicle and use enzymes to digest

Question 4

what do lymphocytes produce

Answer 4

antibodies

Question 5

what is the job of antibodies

Answer 5

bind to antigens on the pathogen surface
stop pathogens from damaging our cells until phagocytes destroy them - put pathogen in a prison of antibodies

Question 6

what is the problem with anitbodies

Answer 6

antibodies have specific shapes and only bind to certain antigens

Question 7

what happens when a lymphocyte creates the correct antibody which is complimentary in shape to the antigen

Answer 7

they will divide some memory cells are created and more lymphocytes are made with the right antibody

Question 8

what do memory cells do

Answer 8

stay in the body for decades and it means if the same pathogen invades we don’t get ill as before

Question 9

when a pathogen attacks the second time what are the 3 factors that prevent us from getting ill? (think graph)

Answer 9

antibodies are produced
1. faster (steeper gradient)
2. Sooner
3. In higher quantity