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Attendance

--Jenny Huang 23:38, 28 July 2010 (UTC)

Cell Division

SMH

The egg and sperm

Picture

Attendance

--Jenny Huang 23:36, 4 August 2010 (UTC)

Search Pubmed

Search Bookshelf Prenatal Diagnosis

Search Pubmed Now: Prenatal Diagnosis

Attendance

--z3224500 23:13, 11 August 2010 (UTC)

Attendance

--Jenny Huang 23:18, 18 August 2010 (UTC)

Lab 2 Questions

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

hCG - human chorionic gonadotropin

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

It produces Estrogen and Progesterone

Lab 3 Questions

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

Carnegie stages 7-9 occur during week 3 spanning days 15-21 and carnegie stages 10-13 occur spanning days 22-30.

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

From the beginning of week 3 the embryo is about 0.4mm and by the end of week 4 3-5mm.

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

The anterior neuropore closes during carnegie stage 11 and the posterior neuropore closes at carnegie stage 13.

Lab 4 Questions

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

The vitelline vein, umbilical vein and the cardinal vein drain into the sinus venosus.

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

The vitallene arteries contribute to the GI tract arteries and the vitallene veins contribute to the adult portal system.

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

The 4 cellular layers are in order : the syncitiotrophoblast, cytotrophoblast, villi connective tissues and fetal capillary endothelium

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

Haematopoetic stem cells

Attendance

--Jenny Huang 23:22, 25 August 2010 (UTC)

Lab 5 Questions

  1. What is the origin of the gastrointestinal tract smooth muscle?

The GIT smooth muscle is derived from the Splanchnic mesoderm that forms the smooth muscle, connective tissue, blood vessels and contributes to organ development.

  2. At what Carnegie stage does the buccopharyngeal membrane begin to break down?

the buccopharyngeal membrane begins to break down during carnegie stage 11 opening the gastrointestinal tract to the amnion.

  3. Identify the lung developmental stage in late embryonic to early fetal period.

During the late embryonic stage of lung development budding of the lungs from the trachea starts at around carnegie stage 22.

  4. In premature infant birth, which respiratory cell type may not have fully developed? 

Alveolar cells (type II) may not fully develop that are responsible for secreting surfactant.

Attendance

--Jenny 23:24, 1 September 2010 (UTC)