Embryo II (Lect)

Question 1

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

Answer 1

neuroectoderm

Question 2

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

Answer 2

endoderm

Question 3

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

Answer 3

mesoderm

Question 4

During which weeks does spina bifida manifest?

Answer 4

4 to 6 (mainly 4)

Question 5

What is it called when digits are fused?

Answer 5

syndactyly

Question 6

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

Answer 6

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

Question 7

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

Answer 7

hypomere

Question 8

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

Answer 8

phayngeal arch mesoderm

Question 9

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

Answer 9

folic acid

Question 10

What induces neurulation?

Answer 10

presence of the notocord

Question 11

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

Answer 11

Notocord

Question 12

Keritinized epithelium is derived from which germlayer?

Answer 12

general ectoderm

Question 13

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

Answer 13

true

Question 14

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

Answer 14

Schwann cells

Question 15

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

Answer 15

neuroectoderm

Question 16

The PNS is derived mostly from which types of cells?

Answer 16

neural crest

Question 17

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

Answer 17

general ectoderm

Question 18

C-cell in the thymus are derived from…

Answer 18

neural crest cells

Question 19

What are the three systems derived from the mesoderm?

Answer 19

musculoskeletal, urogenital, CV

Question 20

What is brachdactyly

Answer 20

shortened limb from missing bone

Question 21

what is phocomelia?

Answer 21

abnormal formation of limbs

Question 22

What is adactylia?

Answer 22

absence of digits

Question 23

What type of mesoderm forms the urogenital tract?

Answer 23

intermediate mesoderm

Question 24

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

Answer 24

sphlanchnic lateral plate mesoderm

Question 25

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

Answer 25

epimere

Question 26

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

Answer 26

hypomere

Question 27

Where do skeletal elements of the limb arise from?

Answer 27

lateral plate mesoderm

Question 28

What cells are responsible for pigment?

Answer 28

neural crest

Question 29

When does nuerulation complete?

Answer 29

w5

Question 30

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

Answer 30

mesenchyme

Question 31

Know how to differentiate between spina bifidas

Answer 31

11