A&P CH.17-2 LEUKOCYTES

Which blood cells are complete cells? (TRUE CELLS)

Leukocytes

What are leukocytes' functions?

Defense against disease

What is leukocytosis?

WBC count above 11,000/μl; normal in infection

Name the 2 major leukocyte categories

Granulocytes and agranulocytes

what cells are granules

neutrophils , eosinophils, basophils

what cells are agranules

lymphocytes, monocytes

neutrophils function

Phagocytize and kill bacteria

eosinophils function

Digest parasites, role in allergies

basophils function

Release histamine; attract WBCs

lymphocytes function

T: attack infected/cancer cells; B: antibodies

monocytes function

Phagocytosis; activate lymphocytes

List leukocytes from most to least abundant

Neutrophils, lymphocytes, monocytes, eosinophils, basophils (mnemonic: Never Let Monkeys Eat Bananas).

What is leukopoiesis and how is it stimulated

WBC production; stimulated by interleukins and CSFs.

How are leukocytes produced from stem cells

Hemocytoblasts branch into lymphoid (lymphocytes) and myeloid (other WBCs) stem cells.

What are leukopenia and leukemia?

: Leukopenia: low WBC count. Leukemia: overproduction of abnormal WBCs.

What is infectious mononucleosis?

Viral disease caused by Epstein-Barr; affects and enlarges lymphocytes