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Anterior- posterior axis formation
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Total cards: 4•Content version: v4•Public deck•Updated: 8/1/2026
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#1
Front (Question)
Which cells migrate first during convergent extension?
Back (Answer)
The anterior endoderm (pharyngeal) cells migrate first, followed by the prechordal mesoderm. They mark the future anterior part of the embryo
#2
Front (Question)
What happens in the chick embryo as the node regresses posteriorly?
Back (Answer)
The posterior nervous system (hindbrain and spinal cord) develop Axial mesoderm is laid down behind the node
#3
Front (Question)
Which signals give cells posterior identity?
Back (Answer)
Retanoic acid and FGF
#4
Front (Question)
Where are BMP antagonists secreted from- and what do they do?
Back (Answer)
Secreted from the organiser- inducing somites in the axial mesoderm and neural identity in overlying ectoderm The organiser dorsalises and patterns adjacent mesoderm