L6 leukocytes and leukopoiesis

Question 1

what are the only formed elements that are true cells ?

Answer 1

WBCs

Question 2

what are the 2 ways WBCs defend the body against foreign organisms >?

Answer 2

phagocytosis and production of antibodies

Question 3

what cells are responsible for tissue rejection ?

Answer 3

T-lymphocytes

Question 4

where do all leukocytes originate ?

Answer 4

all leukocytes originate from pluripotent hematopoietic stem cell that differentiate into myeloid stem cell and lymphoid stem cell

Question 5

what differentiates further from the myeloid and lymphoid stem cells ?

Answer 5

lymphoid stem cells differentiate into lymphocytes while myeloid stem cells differentiate into neutrophils , eosinophils , basophils and monocytes

Question 6

how are B and T lymphocytes formed ?

Answer 6

hematopoietic stem cells differentiate into lymphoid stem cells . these cells either produce B lymphocytes that mature into plasma cells in peripheral lymphoid tissue ultimatly producing anti bodies , OR they go to the thymus gland where they are matured into T-lymphocytes which are activated in the peripheral lymphoid tissue

Question 7

what is the difference between leukopenia , leukocytosis , and leukemia??

Answer 7

leukopenia is decreased number of WBCS

LEUKOCYTOSIS IS A MILD INCREASE IN NUMBER WITH INFECTION

Leukemia is malignant increase in number of WBCs