WBCs

Question 1

neutrophils

Answer 1

-granular
-60-70% of all WBCs
-stained by neutral dyes
-multi-lobed nucleus
-function: phagocytosis and chemical destruction of microbes; first responders to injury or infection

Question 2

eosinophils

Answer 2

-granular
-2-4% of all WBCs
-stained by acidic dyes
-bi-lobed nucleus
-function: defend against parasitic infections, involved in allergic reactions by combatting effects of histamine, and phagocytosis of antigen-antibody complexes

Question 3

basophils

Answer 3

-granular
-less than 1% of all WBCs
-stained by basic dyes
-bi-lobed nucleus (surrounded by large, dark granules
-function: release histamine and other inflammatory chemicals; involved in allergic responses

Question 4

monocytes/macrophages

Answer 4

-agranular
-3-8% of all WBCs
-large, horseshoe-shaped nucleus
-functions: phagocytosis (as a fixed or wandering macrophage)

Question 5

lymphocytes

Answer 5

-agranular
-20-25% of all WBCs
-large, round nucleus
-function: adaptive immunity; B-cells produce antibodies, T-cells mediate cellular immunity, and natural killer (NK) cells destroy virus-infected and cancerous cells