User:Z3305561: Difference between revisions
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'''What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?''' | '''What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?''' | ||
Cord blood (umbilical cord blood, UCB) can be harvested at birth from which stem cells can be collected, typed and stored in Cord Blood Banks. These cells provide a resource for bone marrow replacement therapy in many diseases. | Cord blood (umbilical cord blood, UCB) can be harvested at birth from which Haematopoetic stem cells can be collected, typed and stored in Cord Blood Banks. These cells provide a resource for bone marrow replacement therapy in many diseases. | ||
Revision as of 21:49, 25 August 2010
--Navneet Ahuja 23:38, 28 July 2010 (UTC)
External link SMH
Picture
--Navneet Ahuja 23:15, 4 August 2010 (UTC)
Lab 2 Questions
What factor do the synctiotrophoblast cells secrete to support the ongoing pregnancy?
a> Synctiotropoblast secrete hormone hCG - Human chorionic gonadotropin that support the pregnancy
What does the corpus luteum secrete to prevent continuation of the menstrual cycle?
b> Corpus luteum produces hormone Estrogen and Progesterone that prevents mentruation
--Navneet Ahuja 23:04, 11 August 2010 (UTC)
Questions for lab 3 :
What Carnegie stages occur during week 3 and week 4?
Stages 7 to 9 in week 3 where 3 major importance was given to gastulation,placentation and notochord formation
stages 10 to 13 in week 4 where organogenisis occurs and major organ such as heart are formed.
From week 3 to week 4 = 7-13 carnegie stages
What is the change in overall embryo size form the beginning of week 3 to the end of week 4? At week 3 embryo is 0.4 mm in size measure by CRL and by the end of week 4 (carnegie stage 13) the embryo became 3-5 mm and hence the growth is between 2.6-4.6 mm
Approximately when do the cranial (anterior) and caudal (posterior) neuropores close in the human embryo? The cranial neropore closes at Carnegie stage 11 (about 24 days) within a few hours.
The caudal neropore closes later than cranial neropore since it closes at Carnegie stage 12 (about 26 days) over a day.
--Navneet Ahuja 23:09, 18 August 2010 (UTC)
Lab 4 Questions
Name the vessels that drain into the sinus venosus?
3 pairs of veins empty into the sinus venosus of the heart :
1-vitelline vein
2-umbilical vein
3-cardinal vein
What is the fate of the vitelline artery and vitelline vein?
The vitelline arteries arise from the dorsal aorta and enter the yolk sac, covering its entire surface. It contribute to adult GIT arteries (fuse to become superior mesenteric artery (midgut)
The vitelline veins return red blood cells from the capillary beds to the sinus venosus, posterior to the heart. The vitelline vessels eventually contribute to the portal system of the liver in the adult.
Name the 4 layers that constitute the placental barrier?
The 4 layers that separate maternal and fetal blood are :
1-syncitiotrophoblast
2-cytotrophoblast
3-villi connective tissue
4-fetal capillary endothelium
What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?
Cord blood (umbilical cord blood, UCB) can be harvested at birth from which Haematopoetic stem cells can be collected, typed and stored in Cord Blood Banks. These cells provide a resource for bone marrow replacement therapy in many diseases.
