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HEMOTOLOGY > CH. 4 > Flashcards

CH. 4 Flashcards

1
Q

how many active genes do we have

A

around 300 million

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2
Q

what cell do all WBCs come from

A

hemocytoblast

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3
Q

where in the embryo does mesoblastic hematopoietic phase occur

A

yolk sac

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4
Q

where in the fetus does medullary hematopoietic phase occur

A

bone marrow

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5
Q

what do you call a human that is 0 to 2 months old

A

embryo

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6
Q

what do you call a human that is 2-9 months old

A

fetus

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7
Q

where is the origin of primitive erythroblast

A

yolk sac

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8
Q

what has a higher affinity for O2 fetal hemoglobin or maternal Hgb

A

fetal

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9
Q

what is the normal ratio of myeloid cells (WBCs) to RBC

A

3 :1

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10
Q

why are there more RBCs than WBCs

A

RBCs live a lot longer

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11
Q

what kind of bone marrow do kids have

A

only spongy red marrow

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12
Q

what is in the medullary cavity

A

yellow marrow and spongy red marrow

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13
Q

what are the primary tissues of lymphoid development

A

bone marrow and thymus

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14
Q

after the bone marrow where do T- lymphocytes go

A

thymus

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15
Q

what are the secondary tissues of lymphoid development

A

spleen and lymph nodes

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16
Q

where in the bone marrow do hematopoietic cells exit

A

sinus

17
Q

what is the formula for % cellularity

A

= 100 - age

18
Q

what kind of anemia has hypocellular bone marrow

A

aplastic anemia

19
Q

what do megakaryocytes release

A

platelets

20
Q

what does the liver produce

A

bile and cholesterol

21
Q

what does bile contain

A

bile salts and bilirubin

22
Q

what type of cells are kupffer cells

A

macrophages

23
Q

what did the spleen originate from

A

lymphnode

24
Q

function of the spleen

A

filters blood

25
Q

what cells are mostly found in white pulp in the spleen

A

WBCs and antigen presenting cells

26
Q

if a RBC enters the red pulp does it exit quickly or slowly

A

quickly

27
Q

if a RBC enters the white pulp does it exit quickly or slowly

A

slowly

28
Q

splenomegaly

A

enlarged spleen

29
Q

def? autosplenectomy

A

dead spleen

30
Q

where in the body are there NO lymph nodes

A

CNS and bone marrow

31
Q

what kind of cells are in the cortex of a lymph node

A

antigen presentingcells

32
Q

where is the site of T cell maturation

A

thymus

33
Q

what theory about stem cells is correct

A

monophyletic

34
Q

what diffrentants a stem cell

A

environmental cues

HEMOTOLOGY (6 decks)

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