Z3186093

Lab 1 Questions:

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

ZP3

2. Name the three stages of follicle development in the ovary?

Primordal Follicle Primary Follicle Graafian Follicle

--Jenny Guy 15:00, 30 July 2009 (EST)

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

hCG is secreted

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

an increase in progesterone as usually there is a decrease in progesterone as a result of corpus luteum degeneration at the end of a 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?

Ectoderm - Neural and epithelium.

--Jenny Guy 14:31, 6 August 2009 (EST)

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?

sclerotome

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

stage 13

--Jenny Guy 13:58, 13 August 2009 (EST)

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

Liver

"2. Into what do the dorsal aortas become in the adult?"

Descending aorta

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

syncytiotrophoblast, cytotrophoblast, mesoderm, fetal capillaries

--Jenny Guy 14:24, 20 August 2009 (EST)