Term
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Definition
| -diffusible molecules that specify differentiation of a cell type at a specific location |
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Term
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Definition
-cell fate determined by location along the gradient/morphogen concentration at a specific location
-cells may migrate to a lower or higher concentration of a specific morphogen |
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Term
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Definition
-active form of vitamin A
-posteriorizes the body
-high concentrations in the embryo induce posterior structures to form |
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Term
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Definition
-family of proteins
-help establish dorsal/ventral patterns |
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Term
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Definition
-secreted glycoproteins
-important in establishment of cell polarity, proliferation, apoptosis, cell fate, migration |
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Term
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Definition
-important for early development
-early patterning, cell migration, differentiation |
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Term
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Definition
-notochord
-high conc. at floor of neural tube
-induces formation of interneurons and motor neurons |
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Term
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Definition
-many different altered phenotypes arise
-holoprosencephaly, digit malformations |
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Term
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Definition
-investigative cancer treatments
-suppresses Shh signaling |
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Term
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Definition
| -often specifies fate of precursor cells, maintenance of stem cell populations |
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Term
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Definition
-growth factor signaling
-regulate cell proliferation, apoptosis, migration
-growth of new blood vessels and axonal processes |
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Term
| 8 weeks (end of embryonic period) |
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Definition
-head nearly as large as body
-limbs present
-cardiovascular system functional
-all systems present |
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Term
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Definition
-blood cell formation begins
-sex readily detectable |
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Term
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Definition
-prominant cerebellum
-face looks human |
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Term
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Definition
-fetal position
-quickening occurs |
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Term
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Definition
-increase in weight
-myelination of spinal cord |
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Term
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Definition
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Term
| central acidosis stimulates |
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Definition
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Term
| 3 vascular shunts that bypass |
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Definition
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