Talk:BGDB Sexual Differentiation - Quiz: Difference between revisions

@@ Line 21: / Line 21: @@
-{The mesonephric duct branches to form the
+{The lower end of the mesonephric duct branches to form the:
 |type="()"}
 + ureteric bud
@@ Line 28: / Line 28: @@
 - gonadal bud
 - none of the above
-||The ureteric bud
+||The [[ureteric bud|BGDB_Sexual_Differentiation_-_Early_Embryo#Kidney_and_Mesonephric_Duct]] is a single epithelial branch forming from each mesonephric duct, that extends laterally into intermediate mesoderm as part of early metanephric formation. Mesonephric duct does not form uterus or urethra. As far as I know I made up the term "gonadal bud".
-{Which of the following is incorrect about the block to polyspermy
+{The sequential development of the genital system can best be described as:
 |type="()"}
-- occurs after fertilization
+- internal and external genital tract dependent upon primordial germ cells
-+ occurs when meiosis II is completed
++ gonadal differentiation determining internal then external tract development
-- occurs initially when sperm and oocyte membranes fuse
+- mesonephric duct forming genital ridge then internal and external tract development
-- occurs when cortical granules are released
+- internal tract determining gonadal then external tract development
+- paramesonephric  duct forming genital ridge then internal and external tract development
-||Meiosis II does completes at fertilization, but it has no role in blocking polyspermy.
+||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.

Revision as of 16:20, 2 Haziran 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

Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:

1 Sex determination occurs initially through the SRY transcription factor acting on:

	primordial germ cells
	anterior pituitary
	testes support cells
	ovary support cells
	mesonephric duct cells

2 The adult spermatogenic epithelium is stimulated by follicle stimulating hormone (FSH)

	true
	false

3 The lower end of the mesonephric duct branches to form the:

	ureteric bud
	uterus bud
	urethral bud
	gonadal bud
	none of the above

4 The sequential development of the genital system can best be described as:

	internal and external genital tract dependent upon primordial germ cells
	gonadal differentiation determining internal then external tract development
	mesonephric duct forming genital ridge then internal and external tract development
	internal tract determining gonadal then external tract development
	paramesonephric duct forming genital ridge then internal and external tract development

5 Which of the following statements about the blastocyst is most correct

	the blastocyst forms from the 2 blastomere stage
	the blastocyst has a cavity lined with endoderm
	the blastocyst stage occurs after hatching from the zona pellucida
	the blastocyst has an embryoblast and trophoectoderm layer

6 Select the correct options below for the process of implantation

	is driven by the trophoblast layer
	occurs following adplantation
	can occur inside and outside the uterine body
	allows endocrine support of the corpus luteum

7 The extraembryonic coelom refers too

	amniotic cavity, yolk sac and chorionic cavity
	pericardial cavity, pleural cavity and peritoneal cavity
	blastocoel, somitocoel and lateral plate coelom
	maternal lacunae, uterine gland lumen, uterine body cavity

8 Which of the following statements is incorrect about the process of gastrulation

	gives rise to the trilaminar embryo
	involves cell migration from the epiblast layer
	extends from the primitive node to the buccopharyngeal membrane
	occurs at the region known as the primitive streak
	generates endoderm and then mesoderm layers

9 What are the two main early embryonic developmental roles of the notochord

	mechanical role in embryonic disc folding and signaling for tissue patterning
	formation of the nucleus pulposis and separating cloacal and buccopharyngeal membranes
	gastrulation and neuralation
	formation of the nucleus pulposis and intervertebral disc

10 Ectoderm refers only to the neural plate region of the trilaminar embryo

	true
	false