Z3295026

Lecture Questions- Student: z3295026

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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

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Lab 2 Questions:

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

Syncitiotrophoblasts - form a multinucleated cytoplasmic mass by cytotrophoblast cell fusion and both invade the decidua and secrete hCG which act on ovaries to stop menstration , cell inovaries secretes hormones to to stop the cycle from continuiing (corpus lutuem)

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

The corpus luteum produces progesterone. Progesterone makes the lining of the uterus thick for implantation and is necessary to sustain a healthy pregnancy. The corpus luteum produces progesterone until the placenta begins to take over progesterone production around ten weeks gestation.

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

formed by two germ cell layers including :

1.Epiblast= ecoderm

2.Mesoderm ( spread entire cavity)= extra-embryonic mesoderm (connective tissue in orgin)

3.Endoderm'