From where do haemangioblasts emerge?

Extraembryonic splanchnic mesoderm of yolk sac

Extraembryonic mesoderm of amniotic cavity

Extraembryonic endoderm of yolk sac

Extraembryonic ectoderm of yolk sac

What do haemangioblastic aggregates differentiate into?

Haematopoietic stem cells surrounded by endothelial precursor cells.

Endothelial precursor cells surrounded by haematopoietic stem cells.

Endothelial precursor cells only.

Haematopoietic stem cells only.

By EPCs in the absence of Angiopoietin 2

Formation, migration, and coalescence of endothelial precursor cells.

vascular intussusception (splitting of existing blood vessels)

Intercalation of new EPC into walls of existing vessels

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1From where do haemangioblasts emerge?
1. AExtraembryonic splanchnic mesoderm of yolk sac
2. BExtraembryonic mesoderm of amniotic cavity
3. CExtraembryonic endoderm of yolk sac
4. DExtraembryonic ectoderm of yolk sac
2What do haemangioblastic aggregates differentiate into?
1. AHaematopoietic stem cells surrounded by endothelial precursor cells.
2. BEndothelial precursor cells surrounded by haematopoietic stem cells.
3. CEndothelial precursor cells only.
4. DHaematopoietic stem cells only.
3Which of the following is NOT a site of haematopoiesis in the embryo?
1. ABone marrow
2. BLiver and Spleen
3. CYolk Sac
4. DAmniotic cavity
4Which of the following is not a process by which Vasculogenesis continues in the embryo?
1. AFormation, migration, and coalescence of endothelial precursor cells.
2. BAngiogenesis
3. Cvascular intussusception (splitting of existing blood vessels)
4. DIntercalation of new EPC into walls of existing vessels
5. EBy EPCs in the absence of Angiopoietin 2

Description: uom Haematology Quiz on Untitled, created by cressi_gauci on 13/06/2015.
Author: cressi_gauci
Language: English
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