T3 digest and resp 2

Question 1

In the initial induction of gut endoderm, what does the septum transversum express?

Answer 1

BMP

Question 2

In the initial induction of gut endoderm, what does the cardiac mesoderm express?

Answer 2

FGF

Question 3

What does transition from simple cuboidal to pseudostratified columnar require?

Answer 3

Hhex

Question 4

Cells migrating from hepatic endoderm into mesenchyme of septum transversum, which requires the loos of e-cadherins and proliferation of cells as well as requiring Hhex, Prox1, Tbx3, and HNF6 results in what?

Answer 4

formation of hepatic cords

Question 5

differentiation of hepatic cord cells into hepatoblasts requires what? what do hepatoblasts express?

Answer 5

requires: Hhex, Tbx2, GATA, HGF, BMP, FGF, Wnt
expresses: albumin

Question 6

Hepatoblasts are bipotential. what two things may they become?

Answer 6

Hepatocytes and chlogangiocytes

Question 7

What do hepatocytes express? because of what factors?

Answer 7

albumin and alpha-fetoprotein; HNF-4, FoxA

Question 8

What are the two primordia from which the pancreas arises?

Answer 8

dorsal and ventral pancreas

Question 9

What does the activity of the ventral pancreas depend on?

Answer 9

Pft-1a

Question 10

What is the initial site for development of the respiratory system?

Answer 10

floor of the pharynx (ventral foregut)

Question 11

What molecule marks the site of the ventral foregut, which is also the site of thyroid diverticulum?

Answer 11

Nkx2.1

Question 12

Ridges of the trachea require what to form?

Answer 12

Wnt signaling

Question 13

What nerve innervates the laryngeal musculature?

Answer 13

CN X