2010 BGD Practical 6 - Quiz: Difference between revisions
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==Take the Quiz== | ==Take the Quiz== | ||
<quiz display=shuffle> | |||
{Which of the following sequences of embryonic disc mesoderm is most correct: | |||
|type="()"} | |||
+ medial to lateral: notochord - somites - intermediate - lateral plate | |||
- medial to lateral: paraxial - axial - intermediate - cardiac | |||
- lateral to medial:extraembryonic - lateral plate - intermediate - paraxial | |||
- less than 0.1% of all oocytes formed are released during reproductive life | |||
- oocytes within all antral follicles are released in sequence at ovulation | |||
- oocyte selection occurs at the primordial follicle stage | |||
||extraembryonic is outside the embryonic disc. | |||
{The spermatogenic epithelium is stimulated by follicle stimulating hormone (FSH) | |||
|type="()"} | |||
+ true | |||
- false | |||
|| Follicle stimulating hormone (FSH) does stimulate the spermatogenic epithelium and luteinizing-hormone (LH) stimulates testosterone production by Leydig cells. | |||
{Gamete differentiation occurs while diploid in | |||
|type="()"} | |||
+ oocytes | |||
- spermatozoa | |||
||Oocyte differentiation occurs while diploid (in first meiotic prophase), while spermatozoa differentiation occurs while haploid (after meiosis ends) in spermiogenesis. | |||
{Which of the following is incorrect about the block to polyspermy | |||
|type="()"} | |||
- occurs after fertilization | |||
+ occurs when meiosis II is completed | |||
- occurs initially when sperm and oocyte membranes fuse | |||
- occurs when cortical granules are released | |||
||Meiosis II does completes at fertilization, but it has no role in blocking polyspermy. | |||
{Which of the following statements about the blastocyst is most correct | |||
|type="()"} | |||
- 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 | |||
||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. | |||
{Select the correct options below for the process of implantation | |||
|type="[]"} | |||
+ is driven by the trophoblast layer | |||
+ occurs following adplantation | |||
+ can occur inside and outside the uterine body | |||
+ allows endocrine support of the corpus luteum | |||
||Yes, all the above relate to the process of implantation. | |||
{The extraembryonic coelom refers too | |||
|type="()"} | |||
+ 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 | |||
|| The extraembryonic coelom is the cavity lying outside the embryo forming the amniotic cavity, yolk sac and chorionic cavity. The intraembryonic coelom is the space inside the embryo lateral plate mesoderm forming the pericardial cavity, pleural cavity and peritoneal cavity. The blastocoel is the cavity inside the blastocyst before embryo formation. The somitocoel is the cavity forming inside the early somite before cell proliferation fills the space. The lateral plate coelom is the horseshoe space forming in the embryonic disc that gives rise to the the pericardial cavity, pleural cavity and peritoneal cavity. The maternal lacunae is the blood-filled space formed by the implantation process. The uterine gland lumen and uterine body cavity have nothing to do with embryonic spaces. | |||
{Which of the following statements is incorrect about the process of gastrulation | |||
|type="()"} | |||
- 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 | |||
{What are the two main early embryonic developmental roles of the notochord | |||
|type="()"} | |||
+ 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 | |||
|| 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. | |||
{Ectoderm refers only to the neural plate region of the trilaminar embryo | |||
|type="()"} | |||
- true | |||
+ false | |||
|| The entire layer of the trilaminar embryo is the '''ectoderm''' (meaning outer layer), the neural plate is only the central portion of this layer. Ectoderm forms the central [[N#neural plate|neural plate]] and the lateral parts form the [[E#epidermis|epidermis]]. | |||
</quiz> | |||
{{Template:Quizzes}} | |||
[[Category:Quiz]] [[Category:BGD]] | |||
Revision as of 13:44, 23 May 2010
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 - Implantation to 8 Weeks.
Take the Quiz
Quizzes
Medicine Practicals: Foundations Embryology - BGDA Fertilization to Implantation | Embryo | Fetal | Placenta - BGDB Gastrointestinal | Face and Ear | Sexual Differentiation
General Embryology: Ectoderm Quiz | Mesoderm Quiz | Early Heart Quiz | Placenta Quiz | Respiratory Quiz | Renal Quiz | Genital Quiz
