Talk:BGDB Sexual Differentiation - Quiz: Difference between revisions

@@ Line 12: / Line 12: @@
 - ovary support cells
 - mesonephric duct cells
-||The support cells in the genital ridge, forming the testes, express SRY and this leads to a cascade of signaling differentiating these cells into Sertoli cells. [[P#primordial germ cell|Primordial germ cells]] are not involved in this initial sex determination step. Ovary support cells (granulosa cells) differentiate in the absence of SRY. Sesonephric duct cells, while present early in genital ridge development, are not the initiators of this process but later effected by gonad differentiation.
+||The support cells in the genital ridge, forming the testes, express SRY and this leads to a cascade of signaling differentiating these cells into Sertoli cells, also called sustentacular (structural support) cells of Sertoli. [[P#primordial germ cell|Primordial germ cells]] are not involved in this initial sex determination step. The anterior pituitary participates in later hormonal events. Ovary support cells (granulosa cells) differentiate in the absence of SRY. Sesonephric duct cells, while present early in genital ridge development, are not the initiators of this process but later effected by gonad differentiation.
-{The spermatogenic epithelium is stimulated by follicle stimulating hormone (FSH)
+{The adult spermatogenic epithelium is stimulated by follicle stimulating hormone (FSH)
 |type="()"}
 + true
@@ Line 21: / Line 21: @@
-{Gamete differentiation occurs while diploid in
+{The mesonephric duct branches to form the
 |type="()"}
-+ oocytes
++ ureteric bud
-- spermatozoa
+- uterus bud
-||Oocyte differentiation occurs while diploid (in first meiotic prophase), while spermatozoa differentiation occurs while haploid (after meiosis ends) in spermiogenesis.
+- urethral bud
+- gonadal bud
+- none of the above
+||The ureteric bud

Revision as of 16:00, 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 mesonephric duct branches to form the

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

4 Which of the following is incorrect about the block to polyspermy

	occurs after fertilization
	occurs when meiosis II is completed
	occurs initially when sperm and oocyte membranes fuse
	occurs when cortical granules are released

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