phagocytosis

Question 1

types of white blood cells

Answer 1

phagocytes : non-specific
lymphocytes: specific

Question 2

phagocytes

Answer 2

macrophages that carry out phagocytosis
found in blood and tissue

Question 3

immune response

Answer 3

if pathogens get passed the chemical and physical barriers and enters the blood then white blood cells are the second line of defence

Question 4

step 1

Answer 4

phagocytes can detect chemicals and debris released by pathogens

the abnormal cells attract the phagocytes and will move towards these cells

Question 5

step 2

Answer 5

there is many receptor binding points on the surface of the phagocytes

they will attach to chemicals or antigens on the pathogen through these receptors

Question 6

step 3

Answer 6

phagocytes will change shape and engulf the pathogen

Question 7

step 4

Answer 7

once engulfed, the pathogen is contained with a phagosome vesicle

Question 8

step 5

Answer 8

the lysosome within the phagocyte will fuse with the phagosome and release its content

Question 9

step 6

Answer 9

lysosome enzyme is released into phagosomes

cytic enzyme then hydrolyses the pathogen