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| defines the embryonic midline, and thus the axis of symmetry for the entire body |
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| the ectoderm that lies immediately above the notochord; gives rise to the entire nervous system |
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| the cells that give rise to the brain, the spinal cord, & most of the peripheral nervous system |
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| neuroectodermal precursor cells that are the progenitor cells of the neural tube; produces neurons, astrocytes, & ogliodendroglial cells |
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| the cells at the ventral midline of the neural tube; a specialized strip of epithelial-like cells that send molecular signals to specify position & fate for the neuroectodermal precursors of the spinal cord & hindbrain |
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| a narrow strip of neuroepithelial cells at the dorsal midline of the neural tube that differentiate dorsal cell groups |
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| the dorsalmost limit of the neural tube (along most of its length); the region where the edges of the folded neural plate come together |
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| fill the spaces between the neural tube, embryonic epidermis, & somites |
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| new stem cells arise from _____ divisions of neuroectodermal cells |
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| postmitotic neurons are generated from cells that divide _____ |
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| epithelial-to-mesenchymal transition |
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| the process by which neural crest cells downregulate expression of adhesive genes to allow for migration |
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