embryo triage

Question 1

what forms the smooth muscle int he gut?

Answer 1

a coat of splanchnic mesoderm around the gut tube

Question 2

What form the lining and glandular elemtns of the gut tube?

Answer 2

endoderm

Question 3

what mesentary do the arteries supplying the gut travel through?

Answer 3

the dorsal mesentary

Question 4

what part of the foregut develops the initial dilation tht forms the stomach?

Answer 4

caudal foregut

Question 5

the left vagus nerve supplies the

Answer 5

ventral wall

Question 6

the right vagus nerve supplies the

Answer 6

dorsal wall

Question 7

which mesogastrium forms he greater omentum?

Answer 7

the dorsal mesogastrium

Question 8

the lesser omentum is formed why which mesogastrium?

Answer 8

the ventral mesogastrium

Question 9

what forms the dorsal and ventral pancreatic buds?

Answer 9

foregut ENDODERM

Question 10

the ventral pancreatic bud will form the

Answer 10

pancreatic head, uncincate, and msot of pancreatic duct

Question 11

the dorsal pancreatic bud will form the

Answer 11

pancrratic body neck and tail

Question 12

the cranial limb of the midgut forms the

Answer 12

jejunum and ilium

Question 13

the cuda limb of the midgut forms

Answer 13

lower ilium, ascending colon, transverse colon, cecum and vermiform appendix

Question 14

how many degrees does the caudal limb rotate as it comes back in to the body?

Answer 14

180 degreees –> total 270

Question 15

the cloaca develops from

Answer 15

ectoderm

Question 16

the urogenital ridge develops from what

Answer 16

intermediate mesoderm

Question 17

what do pronephric ducts develop from?

Answer 17

pronephroi of the intermediate mesoder,

Question 18

mesonephri degenerate and their tubules become the

Answer 18

efferent ductules of the testes

Question 19

the collecting portion of the permanent kidney comes from

Answer 19

the uteric bud

Question 20

the exretory portion of the true kidney develops from the

Answer 20

caudal part of the nephorgenic cord

Question 21

important: what is the uteric bud induced by?

Answer 21

metanephrogenic blastema

Question 22

1-4 generation of the collecting tubulus of the metanephros form

Answer 22

major calices

Question 23

what does the allointis form?

Answer 23

the urachus which disappears and forms the median umbilical ligament

Question 24

the majority of the male urethra and the entirely of female urethra is derived from

Answer 24

endoderm

Question 25

which part of the make urethra is not from endo derm and what is it from?

Answer 25

the urethra in the glans penis is from ectoderm

Question 26

where does the smooth muscle of the urethra coem from?

Answer 26

splanchnic mesoderm

Question 27

which part of the urogenital ridge produces the genitals?

Answer 27

the middle partt!

Question 28

when is it possible to tell the different btw a girl and boy fetus?

Answer 28

12-14 weeks

Question 29

what two homones ar enecessary for the formation of tetes?

Answer 29

DHT (dihydrotestosterone) and MIF (mullerian inhibiting fator)

Question 30

SRy codes for what important protein

Answer 30

Testes determining factor (TDF) which induces teste differentiation

Question 31

what does TDF do?

Answer 31

it causes primitive sex cords to proliferate to form testis cords / leads to testes differentiation