The maintenance of the steady-state collection of active cellular proteins required under a particular set of conditions, called ______.

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#Question id: 28512

#Unit 5. Developmental Biology

Fgf10 is function as positive feedback factor in different ways such as___

a) to maintain the activation of both Wnt2b and Tbx5

b) to tells the surface ectoderm to continue to make Fgf8, and the surface ectoderm continues to tell the underlying mesoderm to make Fgf10

c) to maintain the activation of both Wnt3a and Tbx4

d) to tell the mesenchyme cells directly beneath it to continue making Fgf10

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#Question id: 28513

#Unit 5. Developmental Biology

To induce Fgf8 expression by Fgf10, once Fgf8 is made in the surface ectoderm, the surface ectoderm elongates to physically become the AER. which one is the main functions of the AER?

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#Question id: 28514

#Unit 5. Developmental Biology

During which condition further development of distal limb skeletal elements ceases?

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#Question id: 28515

#Unit 5. Developmental Biology

Which of the following is correct prediction, If an extra AER is grafted onto an existing limb bud?

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#Question id: 28516

#Unit 5. Developmental Biology

The two-experiment performed by a scientist with a forelimb mesenchyme and seeing their results;

I-leg mesenchyme is placed directly beneath the wing AER

II-limb mesenchyme is replaced by non-limb mesenchyme beneath the AER

Conclusion of these experiment are seeing; 

a) distal hindlimb structures develop at the end of the limb

b) supernumerary structures are formed, usually toward the distal end of the limb

c) the AER regresses and limb development ceases

Select the correct result about these experiments-

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#Question id: 28517

#Unit 5. Developmental Biology

What would be the effect of FGFs and Wnts treatment on the ‘bone formation’ of young limb bud mesenchyme?