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From Embryology
Revision as of 20:35, 11 August 2010 by Z3252635 (talk | contribs)

Laboratory Attendance

--z3252635 23:44, 28 July 2010 (UTC)

--z3252635 23:16, 4 August 2010 (UTC)

Laboratory 1

This is an internal Link Cell Division Lecture

This is an external Link SMH


Individual Assesments

Individual Assesment 1


Picture

Early zygote.jpg











Laboratory 2

Questions:


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


Syncytiotrophoblasts secrete the hormone hcG also known as Human Chorionic Gonadotrophin. The secretion of hcG (Human Chorionic Gonadotrophin) via the syncytiotrophoblasts prevents the corpus luteum, the remnants of the ovulated follicle in the ovary from collapsing. The secretion also helps maintain the dicidua which in turn support the ongoing pregnancy.


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


The corpus luteum like stated above in question 1 is actually the remains of the dominant follicle in the ovary and secretes the hormone progesterone to prevent the continuation of the menstrual cycle. The increased levels of progesterone released via the corpus luteum help maintain the endometrial lining of the uterus. If there is a drop in the levels of progesterone this will in turn cause the uterus to shed its lining in a process termed menstruation a part in the menstrual cycle.