Hematopoietic Tissue-Downing

Question 1

What are the types of hematopoietic tissue?

Answer 1

myeloid and lymphatic

Question 2

Where is myeloid tissue located?

Answer 2

medullary cavity of bones

Question 3

Where is lymphatic tissue located?

Answer 3

lymph organs: thymus, lymph nodes, spleen, non-encapsulated lymph organs

Question 4

What tissue type is hematopoietic tissue derived from?

Answer 4

mesenchyme (except thymus)

Question 5

From which embryonic structure is hematopoietic tissue derived from?

Answer 5

yolk sac

Question 6

Colony forming units

Answer 6

from yolk sac

form hematopoietic outposts in liver, spleen, and bone

Question 7

Major site of blood formation during fetal life

Answer 7

liver

Question 8

Which bone is first to develop a medullary cavity for myeloid tissue?

Answer 8

clavicle

Question 9

Extramedullary myelopoiesis

Answer 9

pathological

Question 10

Two types of bone marrow

Answer 10

yellow: mostly fat, can be converted
red: site of hematopoiesis

Question 11

Two components of myeloid tissue

Answer 11

parenchyma: fibroblasts, macrophages, fat-storing cells, osteogenic cells
stroma: collagenous fibers, reticular fibers (type III collagen)

Question 12

What type of capillaries permit red and white cells to enter circulation

Answer 12

sinusoidal

Question 13

How many RBCs are produced per second?

Answer 13

1.5 million

Question 14

How long do RBCs need to mature

Answer 14

1 wk

Question 15

Bast cells (RBC) nuclei

Answer 15

multiple nucleoli on progenitor cells, negatively stained

Question 16

Myeloblast and erythroblast common features

Answer 16

large nuclei with nucleoli

rims of basophilic cytoplasm

Question 17

Granulocyte order of differentiation

Answer 17

CFU
Myeloblast
Pro-myelocyte
Myelocyte (differentiated)
Metamyelocyte (amitotic)
Band cell
Mature cell

Question 18

Both T- and B-cells populate __________ after they are formed in the thymus and bone marrow, respectively

Answer 18

secondary lymphoid organs