Talk:BGDB Sexual Differentiation - Quiz: Difference between revisions
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||Differentiation of the initially indifferent gonad is required before internal tract and then external tract development. Both the latter require gonad development and will be abnormal without this first step. Mesonephric duct is present beside the early genital ridge, but does not induce its differentiation. Paramesonephric duct forms after gonad determnation. | ||Differentiation of the initially indifferent gonad is required before internal tract and then external tract development. Both the latter require gonad development and will be abnormal without this first step. Mesonephric duct is present beside the early genital ridge, but does not induce its differentiation. Paramesonephric duct forms after gonad determnation. | ||
{The allantois, cloaca, hindgut and yolk sac are all lined with endoderm | |||
|type="()"} | |||
+ true | |||
- false | |||
|| During week 3 gastrulation generates the endoderm layer that forms an epithelial layer that with embryonic disc folding will line of all the above structures. | |||
{ | |||
{The cells in the adult male and female gonad forming from equivalent primordial cells in each sex are: | |||
|type="()"} | |type="()"} | ||
- | - Sertoli cells and thecal cells | ||
- | - Leydig cells and interstitial cells | ||
- | - primordial germ cells and oocytes | ||
+ | + thecal cells and interstitial cells | ||
+ thecal cells and interstitial cells | |||
||The blastocyst has an [[E#embryoblast|embryoblast]], also called an inner cell mass, and a [[T#trophoectoderm|trophoectoderm]] or trophoblast layer. The 2 blastomere stage develops into the morula and at the formation of the blastocoel is then the blastocyst. The cavity lined by endoderm is the yolk sac and occurs after the blastocyst stage. The blastocyst stage occurs both before and after after hatching from the zona pellucida. | ||The blastocyst has an [[E#embryoblast|embryoblast]], also called an inner cell mass, and a [[T#trophoectoderm|trophoectoderm]] or trophoblast layer. The 2 blastomere stage develops into the morula and at the formation of the blastocoel is then the blastocyst. The cavity lined by endoderm is the yolk sac and occurs after the blastocyst stage. The blastocyst stage occurs both before and after after hatching from the zona pellucida. | ||
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|| The notochord has a mechanical role in how the embryonic disc folds and releases a signal (sonic hedgehog) that patterns surrounding tissues. The nucleus pulposis does form from the notochord (much later in embryonic development) but the notochord does not separate the cloacal and buccopharyngeal membranes or form the intervertebral disc (from sclerotome of somite). Gastrulation and neuralation, you were asleep in the practical class or checking your facebook status. | || The notochord has a mechanical role in how the embryonic disc folds and releases a signal (sonic hedgehog) that patterns surrounding tissues. The nucleus pulposis does form from the notochord (much later in embryonic development) but the notochord does not separate the cloacal and buccopharyngeal membranes or form the intervertebral disc (from sclerotome of somite). Gastrulation and neuralation, you were asleep in the practical class or checking your facebook status. | ||
</quiz> | </quiz> | ||
Revision as of 15:35, 2 June 2011
Here are a few simple questions that relate to your BGD practical, this page is not a part of today's Practical class. You should try in your own time after completing the Practical today.Take the quiz and see what you know, if you get some wrong, try working through through the 2010 BGD Practical - Fertilization to Implantation.
Take the Quiz
