Wk3 GI Development

Question 1

lining of GI and related glands from what embryonic tissue?

Answer 1

endoderm

Question 2

stomodeum (future mouth)

proctodeum (anal pit)

from what embryonic tissue?

Answer 2

ectoderm

Question 3

smooth muscle and CT of GI tract form what embryonic tissue?

Answer 3

splanchnic mesoderm

Question 4

Where does vagus inervation switch to pelvic splanchnic innervation in GI tract?

Answer 4

left colic flexure

Question 5

polyhydramnios?

Answer 5

esophageal atresia/stenosis

Question 6

respiratory distress?

Answer 6

tracheoesophageal fistula

Question 7

Mucous cells in GI epithelium come from?

Answer 7

endoderm

Question 8

Muscularis mucosa derived from?

Answer 8

mesoderm

Question 9

Myenteric nerve plexus derived from?

Answer 9

neuroectoderm?

**not splanchnic mesoderm

Question 10

Failure of apoptosis results in:

Answer 10

esophageal stenosis

Question 11

Arterial supply for developing liver?

Answer 11

celiac artery

**in dorsal mesogastrium

Question 12

Arterial supply for ascending colon?

Answer 12

superior mesenteric artery

Question 13

Ventral mesentary derived from?

Answer 13

transverse septum

Question 14

Liver’s visceral peritoneum formed by?

Answer 14

ventral mesentery

Question 15

Anterior vagal trunk from left or right vagus nerve?

Answer 15

left

Question 16

Spleen develops in the ______ mesentery.

Answer 16

dorsal

Question 17

Spleen develops with which part of the developing GI tract?

Answer 17

foregut

Question 18

Blood supply to the spleen?

Answer 18

celiac trunk

Question 19

Hypertrophy of CIRCULAR smooth muscle of stomach outlet?

Answer 19

pyloric stenosis

Question 20

Non-bilious projectile vomiting?

Answer 20

pyloric steniosis

Question 21

Bilious vomitting due to failure of recanalization of the intestine?

Answer 21

intestina atresia or stenosis

Question 22

Liver bud origin?

Answer 22

endoderm

Question 23

Gallbladder, cystic duct, and ventral pancreas origin?

Answer 23

Endodermal hepatic diverticulum

Question 24

Interlobular connective tissue of the liver origin?

Answer 24

transverse septum

Question 25

Accessory pancreatic duct from which pancreas?

Answer 25

dorsal

Question 26

omphaloenteric remnant (yolk stalk)

2 ft proximal to iliocecal junction in adult:

Answer 26

Meckel diverticulum

Question 27

Due to persistent umbilical herniation:

Answer 27

congenital omphalocele

Question 28

Exposed intestines due to abnormal lateral body wall folding?

Answer 28

gastroschisis

Question 29

Proctoduem lymphatics drain to:

Answer 29

superficial inguinal nodes

Question 30

Hindgut lymphatics drain to:

Answer 30

inferior mesenteric nodes

Question 31

Failure of neural crest cells to migrate into the splanchnic mesoderm of the distal colon?

Answer 31

Hirschsprung’s disease

aganglionic megacolon