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Attendance

--z3186755 23:42, 28 July 2010 (UTC)

--3186755 23:15, 4 August 2010 (UTC)

--3186755 23:28, 11 August 2010 (UTC)

--3186755 00:05, 19 August 2010 (UTC)

Lab Questions

Lab 2 Questions

1.What factor do the synctiotrophoblast cells secrete to support the ongoing pregnancy?

secrete Human Chorionic Gonadotropin (hCG)

2.What does the corpus luteum secrete to prevent continuation of the menstrual cycle?

produces progesterone and estrogen

Lab 3 Questions

1. What Carnegie stages occur during week 3 and week 4?

Week 3: Carnegie Stages 7 - 9, hallmark features that occur during these stages include gastrulation, development of the notohord and placentation

Week 4: Carnegie Stages 10-13, hallmark features include initial development of the heart, pharyngeal arches and placodes

2. What is the change in overall embryo size form the beginning of week 3 to the end of week 4?

Start of week 3 - stage 7: embryo diameter of 0.4mm

End of week 4 - stage 13: embryo diameter between 3-5mm

3. Approximately when do the cranial (anterior) and caudal (posterior) neuropores close in the human embryo?

Stage 11 (aprox 24 days) - cranial neuropore closes within a few hours

Stage 12 (aprox 26 days) - caudal neuropore takes a day to close

Lab 4 Questions

1. Name the vessels that drain into the sinus venosus?

vitelline vein, umbilical vein and the cardinal veins (anterior, common and posterior)

2. What is the fate of the vitelline artery and vitelline vein?

the vitelline arteries contribute to adult GIT arteries and later fuse to become the superior mesenteric artery.

the vitelline veins contribute to the adult portal system.

3. Name the 4 layers that constitute the placental barrier?

4 layers are: syncitiotrophoblast, cytotroblast, villi connective tissue and fetal capillary endothelium

4. What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?

hematopoietic stem cells (HSCs)

bewbewbew

smh

Extra Stuff

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