Gastrointestinal Quiz

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Here are a few simple questions that relate to your practical, this page is not a part of today's Practical class.

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1 During week 3 which of the following early embryonic structures is/are established by gastrulation:

	the coelomic space
	the epiblast and hypoblast layers
	the endoderm and mesoderm layers
	the connecting stalk.

2 During embryonic disc folding in week 3 only the ectoderm layer folds ventrally left, right and above and below the notochord.

	true
	false

3 The intraembryonic coelom is a horse-shoe shaped cavity that develops in the lateral plate mesoderm from a series of smaller cavities fusing. Which of the following descriptions best describes the structure that then forms in this region.

	somatic mesoderm close to ectoderm, the intraembryonic coelom and the splanchnic mesoderm closest to the endoderm.
	somitic mesoderm close to ectoderm, the intraembryonic coelom and the splanchnic mesoderm closest to the endoderm.
	somatic mesoderm close to endoderm, the intraembryonic coelom and the splanchnic mesoderm closest to the ectoderm.
	somitic mesoderm close to endoderm, the intraembryonic coelom and the splanchnic mesoderm closest to the ectoderm.
	intermediate mesoderm medially close to somites and laterally close to the intraembryonic coelom.
	none of the above.

4 The intraembryonic coelom finally forms

	the pericardial, pleural and periotoneal cavities.
	a single percardial cavity and two pleural and two peritoneal cavities.
	the neural tube lumen, gastrointestinal tract lumen and neural crest.
	the cavities of the paired dorsal aortas running the length of the embryo.

5 The liver is formed from which of the following embryonic structures.

	the septum transversum
	the vitelline veins.
	the placental veins.
	the gastrointestinal endoderm.
	all of the above.

6 The following gastrointestinal tract structures undergo developmental rotation except:

	stomach
	duodenum
	ventral pancreas
	midgut
	hindgut

7 The caudal part of the midgut loop forms many intestine structures except:

	distal ileum
	vitelline duct
	cecum
	ascending colon
	proximal part of transverse colon