From Embryology

Lab 1 Questions

1)What is the protein that sperm binds to on the surface? ZP3

2)Name the 3 stages of follicle development in the ovary.

- Primordial follicle - Preantral follicle - Antral follicle (Graafian)

--Sumaiya Rahman 13:08, 6 August 2009 (EST)

Lab 2 Questions

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

Human Chorionic Gonadotropin (hCG)

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


3. What are the 2 main tissues to be derived from the germ cell layer continuous with the lining of the amniotic sac?

Nervous tissue and epithelium of the skin

Links for group assignment


http://books.google.com/books?id=RY0rXE2HgqsC&pg=PA344&dq=rabbit+embryo+stages&as_brr=3#v=onepage&q=rabbit%20embryo%20stages&f=false - good for what studies in rabbit embryo has been used for. And has a good table for embryological stages!!


http://books.google.com/books?id=73bbKzqRvLsC&pg=PA156&dq=rabbit+embryo+stages&lr=&as_brr=3#v=onepage&q=rabbit%20embryo%20stages&f=false - picture of implantation


--Sumaiya Rahman 13:14, 13 August 2009 (EST)

Lab 3 Questions

1. What period of human development (in weeks) do the 23 Carnegie stages cover? 8 weeks

2. What part of the somite will contribute to the vertebral column? The ventromedial component - sclerotome

3. At what Carnegie stage does the human neural tube normally completely close? Stage 13

--Sumaiya Rahman 13:57, 20 August 2009 (EST)

Lab 4 Questions

1. Into what structure do most blood vessels empty before they enter the embryonic heart? The liver

2. What do the dorsal aortas become in the adult? The descending aorta

3. What are the layers of cells found in a tertiary villi?

--Sumaiya Rahman 14:13, 27 August 2009 (EST)

Lab 5 Questions

1. What was the question I said in the respiratory lecture would be part of this week's assessment?

Is it more common for a congenital diaphragmatic hernia to happen on one side or both?

2. What is the answer to the above question?

It is more common for a diaphragmatic hernia to occur on one side. Majority (80%) occur on the left side.

--Sumaiya Rahman 13:59, 3 September 2009 (EST)

Lab 6 Questions

1. Which is the more common clefting, cleft lip or cleft palate? Cleft lip is more common

2. What structures does pharyngeal pouch 1 form? tympanic membrane, tympanic cavity, mastoid antrum, auditory tube

3. Neural crest forms which cells within the skin? melanocytes

http://www.reproduction-online.org/cgi/reprint/125/4/479 http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2694706

--Sumaiya Rahman 13:46, 17 September 2009 (EST)

Lab 7 Questions

1. Briefly; what is a myotube and how is it formed? - Elongated mulitinucleated cells that have peripherally located myofibrils. - They are formed by a fusion of myoblasts during skeletal development and eventually develop into mature muscle fibres.

2. What changes would I expect to see in the muscle fibre types in my legs if I:

a) Suffered a spinal cord injury -Muscle atrophy -conversion of slow twitch muscle fibres to fast twitch muscle fibres.

b) Took up marathon running -Conversion of fast twitch muscle fibres to slow twitch muscle fibres

--Sumaiya Rahman 13:32, 24 September 2009 (EST)

--Sumaiya Rahman 13:21, 1 October 2009 (EST)


Lab 10 Questions

  • Question 1 - Identify and name 3 tissue types which contain adult (somatic) stem cells that were used/studied from the 5 articles discussed during the tutorial.

-Muscle, Bone marrow and adipose tissue

  • Question 2 - Name 2 reprogramming strategies/methods used in generating human induced Pluripotent Stem Cells (iPSCs) from the 5 articles discussed during the tutorial.

Lentivirus, Virus-free integration - epizonal factors

  • Question 3 - Is the following statement TRUE or FALSE?

"Unlike the nuclear genome, the mitochondrial DNA in the embryo is derived almost exclusively from the egg; that is, it is of maternal origin." - TRUE

--Antonio Lee 15:05, 31 October 2009 (EST)3/3 Correct (NB Q2 Episomal Vectors)

--Sumaiya Rahman 15:35, 8 October 2009 (EST)

--Sumaiya Rahman 14:41, 15 October 2009 (EST) --Sumaiya Rahman 14:08, 22 October 2009 (EST)