m9 + 10 lab - WBCs

Question 1

when is the immune system active?

Answer 1

• immune system is inactive until you are infected

Question 2

what is the natural killer (NK)?

Answer 2

• hybred lymphocyte
• always active —> always on the look out for foreign cells
• can detect mutations - kill them before they become cancerous

Question 3

what is the total amount in a differential WBC count?

Answer 3

4,800 - 10,800/ul)

Question 4

what are the granulocytes?

Answer 4

short lived (days) - have to be replaced every few days
- neutrophils (50 - 70%) m/c
- eosinophils (2 - 4%)
- basophils - mast cell (0.5 - 1%)

Question 5

what are neutrophils?

Answer 5

50 - 70% (m/c)
- phagocytes
- used in acute bacterial infections
- live 3 days - dead ones = pus

Question 6

what are eosinophils?

Answer 6

2 - 4%
- live about a week
- used in parasitic infections
- moderate inflammation

Question 7

what are basophils?

Answer 7

0.5 - 1%
- called a mast cell when inside tissue
- least common WBC
- release histamine/heparin
- live 1-2 days

Question 8

how long are agranulocytes alive for?

Answer 8

• live for years inside body

Question 9

what are lymphocytes?

Answer 9

25 - 45% (m/c)
- used for immunity
- B cells - release antibodies
- T cells - organize + attack
- longest lived (years)

Question 10

what are monocytes?

Answer 10

3 - 8%
- called macrophages (big eaters) too
- live for years

Question 11

what do “segs” neutrophils look like?

Answer 11

m/c
- segmented nuclei

Question 12

what do eosinophils look like?

Answer 12

• usually “bi-lobe” nucleus
• surrounding red granules

Question 13

what do basophils look like?

Answer 13

• black and red speckles

Question 14

what do “typical” lymphocytes look like?

Answer 14

2nd m/c
- giant round nucleus

Question 15

what do monocytes look like?

Answer 15

• blue
• usually horse shoe shaped nucleus