Various concentrations of Shh along the dorsoventral axis serve to activate or repress several transcription factors which then act in combination to specify neural progenitor domains and, ultimately, neurons (Figure Q7-5) . The spinal cord progenitor domain in which Pax6 and Nkx6.1, but not Irx3 or Nkx2.2, are expressed will give rise to: 
Figure Q7-5
Definitions:
Average Costs
The total costs divided by the quantity of goods produced, measuring the cost per unit of production.
Industry Exhibits
Industry Exhibits are organized events where companies from a specific industry showcase and demonstrate their latest products, services, and technologies to potential clients, investors, and the public.
Long-Run Average Cost Curve
A graphical representation that shows the minimum average cost of production at various levels of output when all inputs, including capital, are variable.
Diseconomies of Scale
A situation in which a company or business grows so large that the costs per unit increase with the level of output.
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