Z3126328

Attendance LAB1--Jin Lee 13:15, 13 July 2009 (EST)

--Mark Hill 21:58, 5 August 2009 (EST) Where are your answers from Laboratory 1 Assessment?

Attendance LAB2--Jin Lee 13:07, 6 August 2009 (EST)

Lab 1 Questions

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

Zona pellucida protein ZP3 acts as receptor for sperm

2. Name the three stage of follicle development in the ovaries?

1. Primordal follicle

2. Secondary follicle- (Pre-antral follicle)

3. Graffian follicle- (Antral follicle):is the mature follicle

Lab 2 Questions

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

hCG(Human Chorionic Gonadotropin)

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

progesterone, oestrogen

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

1.ectoderm, which forms nervous system tissue 2.epithelium of epidermis --Jin Lee 13:53, 12 August 2009 (EST)

Attendance LAB3--Jin Lee 13:05, 13 August 2009 (EST)

Lab 3 Questions

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

8weeks 4days

2. What part of the somite will contribute to the vertebral column?

paired Sclerotome of somite (ventral half)and the midline ventral patterning structure the notochord contribute to the formation of axial vertebral column.

SomiteinVertebralColumn

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

Human neural tube normally completely close at Carnegie stage 13(appox.4 weeks).

--Attendance LAB4--Jin Lee 13:16, 20 August 2009 (EST)

Lab 4 Questions

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

2. What do the dorsal aortas become in the adult? The Desending Aorta

3. What are the layers of cells found in a tertiary villi? Blood Vessels Cytotrophoblast layer Extra-Embryonic Mesoderm

Attendance LAB5--Jin Lee 13:21, 27 August 2009 (EST)