Immune Cells and Roles of Antibodies

Question 1

NK cell

Answer 1

a type of leukocyte responsible for the recognition and destruction of damaged and/or infected host cells

Question 2

phagocytes

Answer 2

a group of leukocytes responsible for the endocytosis and desctruction of pathogens and foreign material

Question 3

which phagocytes are APCs

Answer 3

macrophages and dendritic cells

Question 4

mast cells

Answer 4

a type of leukocyte responsible for releasing histamine during allergic and inflammatory responses

Question 5

eosinophils

Answer 5

a large granular leukocyte responsible for the release of toxic chemical mediators

Question 6

interferons

Answer 6

a cytokine released by virally infected cells that increases the viral resistance of neighbouring uninfected cells

Question 7

complement proteins

Answer 7

a number of different proteins found in the blood that opsonise, cause lysis and attract phagocytes to invading proteins

Question 8

neutralisation

Answer 8

block the site of pathogens used to attack host cells and block active sites of toxins

Question 9

agglutination

Answer 9

bind together with antigens on two separate pathogens, forming large antigen-antibody complexes

Question 10

immobilisation

Answer 10

restrict the movement of pathogens around the body through the formation of large antigen-antibody complexes

Question 11

opsonisation

Answer 11

bind directly to the surface of a pathogen to make it easier to phagocytose

Question 12

activation of complement proteins

Answer 12

antibodies attached to the surface of pathogens facilitate the actions of complement proteins, including the formation of MACs