Embryo II (Lect) Flashcards Preview

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Flashcards in Embryo II (Lect) Deck (31)
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1

The neural plate is composed of which of the following types of cells?

neuroectoderm

2

What are the cells that line the digestive tract derived from?

endoderm

3

What cell line may be responsible for malfomations of the urinary bladder and heart?

mesoderm

4

During which weeks does spina bifida manifest?

4 to 6 (mainly 4)

5

What is it called when digits are fused?

syndactyly

6

If a newborn suffers from server lumbar scoliosis what is most likely the embryological basis for this anomaly?

Sclerotomal cells did not migrate and differentiate on one side of the lumber neural tube

7

What tissue gives rise to the muscles of the abdominal wall?

hypomere

8

Where are most of the skeletal muscles in the head derived from?

phayngeal arch mesoderm

9

What substance can be supplemented to reduce the effects of NTDs?

folic acid

10

What induces neurulation?

presence of the notocord

11

If you have a hypertrophied nuclea pulposa in several discs what embyonic structure may have not developed correctly?

Notocord

12

Keritinized epithelium is derived from which germlayer?

general ectoderm

13

T or F: postganglionic neurons in chain ganlia and collateral ganglia are derived from the same embryonic primordium as the DRG?

true

14

Which myelinating cellis would be affected by a loack of development of the neural crest cell population?

Schwann cells

15

Tissue in the CNS is derived from what type of embryonic cells?

neuroectoderm

16

The PNS is derived mostly from which types of cells?

neural crest

17

Tissues on the surface of the body are mostly derived from...

general ectoderm

18

C-cell in the thymus are derived from...

neural crest cells

19

What are the three systems derived from the mesoderm?

musculoskeletal, urogenital, CV

20

What is brachdactyly

shortened limb from missing bone

21

what is phocomelia?

abnormal formation of limbs

22

What is adactylia?

absence of digits

23

What type of mesoderm forms the urogenital tract?

intermediate mesoderm

24

What type of mesoderm gives rise to all smooth muscle besides the urogenital system (e.g. GI, cardiac, vessels)?

sphlanchnic lateral plate mesoderm

25

What gives rise to the muscles of the deep back on neck?

epimere

26

What gives rise to the skeletal muscle that is not in the deep back and neck?

hypomere

27

Where do skeletal elements of the limb arise from?

lateral plate mesoderm

28

What cells are responsible for pigment?

neural crest

29

When does nuerulation complete?

w5

30

What tissue gives cell line give rise to the annulus fibrosa?

mesenchyme