Neural crest and its derivative & formation of epidermal structures

What does Neurotrophins (NT-3) do?

Helps neuron choose final target

True or false: neural crest cells do not dissociate from both epidermis and neural tubes?

false they do dissociate

Which part of the Semite does the trunk nRural crest cell migrate to?

Ventral path through anterior scerolome becomes ganglia

What is Ephrin and Eph? What does it do?

Ephrin (ligand) binds to Eph which is the receptor on the neural crest cell membrane and repel the cel migration

How do cells know when they have arrived }

Stop signals. Stem cell factor binds to Kit receptor

What happens when NC cells get implanted into another embryo?

They change their cell fate

What is the step right before melanoblSt becomes melanocytes

Neural crest cells invade stratum germinativum layer

Where does dermis come from in trunk and head?

In trunk: from somite

In head: from neural crest

Define heterotopic? And the tissue recombination

Change in location. Thigh dermis implanting therefore thigh wing feather is formed. Different morphology.

What induces ectoderm morphogenesis?

Neural crest mesenchymes

What is needed for tooth development?

interaction between oral epithelium and neural crest mesenchyme