Haematopoiesis Flashcards

hey

1
Q

What is the largest component of the blood

A

Plasma

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2
Q

What is Haematopoiesis

A

process by which blood cells are formed

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3
Q

life span of erythrocytes

A

120 days

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4
Q

life span of platelets

A

9-10 days

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5
Q

Where does Haematopoiesis take place in an adult

A

vertebrae, ribs, sternum,skull,sacrum,pelvis and proximal end of femur

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6
Q

In an infant where does Haematopoiesis take place in an infant

A

bone marrow

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7
Q

What is red marrow made of

A

haematopoietic tissue

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8
Q

What is yellow bone marrow made of

A

Fat cells

microenvironment of stroll cells and matrix

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9
Q

What is the CFU-GEMM also called

A

myeloid stem cell

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10
Q

What is the order of making a mature erythrocyte

A
Myeloid stem cell
Proerythroblast 
Erythroblasts
Normoblasts 
reticulocyte 
Mature erythrocyte (RNA lost)
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11
Q

What is the growth factor for red blood cells

A

Erythropoietin

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12
Q

What is thrombopoiesis

A

production of platelets

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13
Q

What stimulates the production of platelets

A

Thrombopoietin

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14
Q

What is the process of production of megakaryoblasts

A

endomitosis

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15
Q

What is the largest WBC

A

Monocyte

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16
Q

What is the most abundant WBC

A

neutrophile

17
Q

What do Eosinophils protect against

A

parasites

18
Q

do all WBC have nucleus

A

yes bro

19
Q

where does GATA-1 differentiates cells

A

erythropoietic and megakaryocytic cell lineages

20
Q

where does PU.1 differentiate cells

A

myeloid lineage

21
Q

Erythropoietin (EPO)

A

Regulates erythropoiesis
Mainly synthesised in kidneys and liver
Reduction in red cell number results in decreased oxygen to tissues
Development of hypoxia in kidneys and liver
Leads to increased production of red blood cells
This corrects hypoxia and EPO synthesis switched off

22
Q

what does IL-3 help with

A

Works in conjunction with GM-CSF to proliferate most haemopoietic progenitor cells

23
Q

what does IL-5 help with

A

Plays a role in growth and differentiation of eosinophils

24
Q

where it Il-5 produced

A

T lymphocytes