Z3223194

30/7/09 Lab 1 Questions

1. What is the zona pellucida protein that binds spermatozoa to the oocyte surface?

  A: Zona pellucida protein ZP3

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

  A: (i)   Primordial follicle
     (ii)  Preantral follicle
     (iii) Antral (or Graafian) follicle

6/8/09 Lab 2 Questions

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

  A: hCG (Human Chorionic Gonadotropin Hormone)

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

  A: Progesterone, Oestrogen.

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

  A: The germ cell layer continuous with the lining of the amniotic sac is ectoderm. 
     It's two main derivatives are:
       (i)  Nervous Tissue
       (ii) Epithelial Layer of Skin

--Bronwyn Lewis-Jones 14:18, 6 August 2009 (EST)

13/8/09 Lab 3 Questions

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

  A: The first 8 weeks

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

  A: The Sclerotome forms the vertebral bodies and intervertebral disks.

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

  A: Stage 13

--Bronwyn Lewis-Jones 14:03, 13 August 2009 (EST)

20/8/09 Lab 4 Questions

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

  A: Sinus venosus

2. What do the dorsal aortas become in the adult?

  A: The descending thoracic aorta

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

  A: Endothelium of the capillary, 
     Extraembryonic mesoderm, 
     Cytotrophoblast, and 
     Syncytiotrophoblast

--Bronwyn Lewis-Jones 14:00, 20 August 2009 (EST)