Immune cell types

Question 1

Macrophages

Answer 1

• monocyte progenitors that are 6% of WBC’s
• long lived
• experts at phagocytosis
• can kill 100’s of different bacteria

Question 2

Neutrophils

Answer 2

• 15% of WBC’s, monocyte progenitor
• experts at phagocytosis because there are so many of them
• short lived
• can kill 1 bacteria

Question 3

Mast Cells

Answer 3

• rare in blood, mostly in tissue, monocyte progenitor
• small nucleus, granule-rich cytoplasm
• release granular contents (histamine) to trigger reaction

Question 4

Dendritic Cells

Answer 4

• prior to activation, reside in tissues, monocyte progenitor
• can phagocytose, but not expert killers
• best cell at activating T cells

Question 5

Leukocyte

Answer 5

generic term for WBC

Question 6

lymphocyte

Answer 6

B and T cells

Question 7

Monocyte

Answer 7

myeloid derived leukocyte (dendritic cell or macrophage)

Question 8

cytokines

Answer 8

small soluble proteins rapidly secreted by one cell that can alter the behaviour or properties of the cell itself or another cell

Question 9

chemokines

Answer 9

(CXCL8) produced by TLR4 to recruit more macrophages to the site of infection