Talk:BGDB Sexual Differentiation - Quiz: Difference between revisions
From Embryology
| Line 33: | Line 33: | ||
{The sequential development of the genital system can best be described as: | {The sequential development of the genital system can best be described as: | ||
|type="()"} | |type="()"} | ||
- internal and external genital tract dependent upon primordial germ | - internal and external genital tract dependent upon primordial germ cell hormone secretion | ||
+ gonadal differentiation determining internal then external tract development | + gonadal differentiation and hormone secretion determining internal then external tract development | ||
- mesonephric duct forming genital ridge then internal and external tract development | - mesonephric duct hormone secretion forming genital ridge then internal and external tract development | ||
- internal tract determining gonadal then external tract development | - internal tract determining gonadal then hormone secretion for external tract development | ||
- paramesonephric duct forming genital ridge then internal and external tract development | - paramesonephric duct forming genital ridge then hormone secretion for internal and external tract development | ||
||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. | ||
| Line 45: | Line 45: | ||
+ true | + true | ||
- false | - false | ||
|| During week 3 gastrulation generates the endoderm layer that forms an epithelial layer that with embryonic disc folding | || During week 3 gastrulation generates the endoderm layer that forms an epithelial layer that with later embryonic disc folding lines all of the above structures. | ||
| Line 54: | Line 54: | ||
- primordial germ cells and oocytes | - primordial germ cells and oocytes | ||
+ thecal cells and interstitial cells | + thecal cells and interstitial cells | ||
- ductus deferens and mesonephric ducts | |||
|| | ||'''Thecal cells''' (female) and '''interstitial cells''' (male) both form the sex hormone secreting cell population in the gonads. Leydig cells and interstitial cells are 2 names for the same cell in the testis. Primordial germ cells exist in both sexes and do form oocytes, but this is not what the question asked. The ductus deferens is the male internal genital tract formed from the mesonephric ducts. | ||
Revision as of 15:47, 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
