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Embryology Test (Part 1)

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1) Which pharyngeal arch gives rise to no muscular or skeletal structures?

2) A Bicornuate uterus is due to which of the following?

3) The 7th cranial nerve develops from which pharyngeal arch?

4) Which of the following is a feature of intestinal malrotation?

5) Somites are derived from which germ layer?

6) Ootidogenesis refers to which process during Oogenesis?

7) At what gestation does physiological gut herniation occur?

8) The placenta develops from which structure?A) 6 weeks gestation

9) Approximately how many oocytes are present in the ovaries at birth?

10) From which germ layer does the myenteric plexus of the GI tract developed: A) 6 weeks gestation

11) Branches V2 and V3 of the Trigeminal nerve develop from which pharyngeal arch?

12) From which germ cell layer does the GI tract initially develop? A) Neural crest of Ectoderm

13) What process changes a spermatogonium into a primary spermatocyte?

14) The thyroid cartilage and cricothyroid muscle develop from which pharyngeal arch?

15) What process would you expect a secondary spermatocyte to undergo during spermatogenesis?

16) When does Oocytogenesis complete?

17) From which germ layer does the Pancreas develop? A) 6 weeks gestation

18) The subclavian artery develops from which pharyngeal arch?

19) During formation of the mid, fore and hind guts the initial gut tube undegoes rotation. Which of the following is correct regarding rotation of the midgut during this process?

20) The third pharyngeal arch gives rise to which of the following structures?

21) From which germ layer does the kidney develop?

22) What is the principle arterial supply to the ascending colon? A) Neural crest of Ectoderm

23) From which germ layer does the Pituitary develop?

24) What is the principle arterial supply to the jejunum?

25) From what does the blastocyst hatch?

26) Which of the following structures develop from the mesodermal somites?

27) The second pharyngeal arch gives rise to which of the following structures?

28) At what age does meconium first appear in the fetal terminal ilium?

29) How many days after fertilisation does implantation typically occur?

30) What is the innervation to the sigmoid colon?

31) The external carotid artery develops from which pharyngeal arch?

32) The 6th pharyngeal arch gives rise to which of the following?

33) How many days after fertilisation does the morula form?

34) The round ligament develops from which structure?

35) How many days after fertilisation does the blastocyst form?

36) During oogenesis which cell type has the greatest number of chromatids?A) Neural crest of Ectoderm

37) What is the innervation to the 4th part of duodenum?

38) Which pharyngeal arch is closest to the head of the embryo?

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