17.2 erythrocyte structure complements func

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6 Terms

1
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mature erythrocyte

  • lasts 4 months (apoptosis)

  • a lot smaller than what it started as

  • more surface area bc of no nuclus to carry more HEMOGLOBIN

2
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what phase of erythropoiesis ejects the nucleus

orthochromatic erythroblast

3
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1-7 days phase

proerythroblast --> basophilic erythroblast --> prolychromatic erythroblast --> orthochromatic erythroblast --> reticulocyte

4
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erythropoiesis

process of RED blood cell formation

 

red bone marrow --> hematopoietic stem cell --> myeloid stem cell --> [proerythroblast --> basophilic erythroblast --> polychromatic erythroblast --> orthochromatic erythroblast --> reticulocyte] --> mature erythrocyte

5
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how many cells are destroyed each hour

150 million RBC every hr

6
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erythrocyte structure

  • biconcave shape allows RBCs to bend, fold, and "stack" to prevent blockage in tiny blood vessels

  • biconcavity also increases surface area for gas exchange

  • anucleate: no nucleus, carries very little DNA, unable to synthesize proteins

  • prone to apoptosis (programmed cell death :( @ 4mo/120 days)