WBC Flashcards
What are the 2 types of WBC
neutrophils and lymphocytes
Where are WBC inovlved
immune system
What are the 2 types of cells in lymphocytes
B cells and T cells
What are the characteristic of lymphocytes
- recognise them by their large nucleus
- Once you are infected, they produce memory cells, so if you get affected again you react faster
T cells
bind to infected cells, becomes activated and divide by mitosis into:
- T helper
- T memory
- T killer
What does the T helper do
help activate B cells
What does the T memory do
stay in the blood for next time
- protective immunity against invading pathogens,
What does the T killer do
kill the infected/ cancerous cells
B cells
bind to antigens on pathogens in the blood
T helper cells help activate them to divide by mitosis into:
- B effector
- B memory
What does the B effector cells do
produced antibodies
what does the B memory cells do
(plasma cells)
Stay in the blood for next time
What are the characteristics of neutrophils
You can recognise them by their nucleus that has several lobes
- this makes them flexible & mobile so they can squeeze between cells in the capillary wall to move to where the infection is
They are the most common type of white blood cell
What are neutrophils
phagocytes
How do neutrophils kill pathogens
by engulfing them through phagocytosis
What happens in the body during an allegery
e.g hayfever
You release histamine which produce extra neutrophils
causes swelling
