ANAT2341 Lab 5 - Online Assessment: Difference between revisions
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{During Gastrulation, or gut formation, at the rostral and caudal end of the embryo which membrane breaks down first and when does it occur?: | |||
|type="()"} | |||
- buccopharangeal membrane at 6 weeks | |||
- cloacal membrane at 5 weeks | |||
+ buccopharangeal membrane at 4 weeks | |||
- coacal membrane at 4 weeks | |||
||At week 4 the '''buccopharangeal membrane''' breaks down first and now the foregut is open to the amniotic cavity and amniotic fluid will fill the foregut. The present '''cloacal membrane ''' breaks down afterwards and divides into '''urogenital sinus''' and '''rectum'''. | |||
{During Gastrulation which organ forms first after the heart tube, and at what week of embryo development does this occur?: | |||
|type="()"} | |||
- Pancreas at 5 weeks | |||
- Foregut of stomach at 6 weeks | |||
+ Liver at 4 weeks | |||
- Kidneys at 5 weeks | |||
||At week 4 beginning of stage 11 the primitive liver forms at the level of the transverse septum underneath the stomach bud. It is the first organ to form after the heart tube. | |||
{When the primitive stomach is forming in Week 4 how many turns does it need to take in order to form the correct adult anatomical position?: | |||
|type="()"} | |||
+ Two turns 90 degrees each | |||
- One turn at 90 degrees and one turn at 45 degrees | |||
- Only one turn at 90 degrees | |||
- Only one turn at 180 degrees | |||
||During week 4 at the level where the stomach will form the tube begins to dilate, forming an enlarged lumen. | |||
The dorsal border grows more rapidly than ventral first rotation (of 90 degrees), which establishes the greater curvature of the stomach. | |||
A second rotation (of 90 degrees) occurs on the longitudinal axis establishing the adult orientation of the stomach. Thus there are two rotations the primitive stomach must undertake, the first one at 90 degrees to establish the classic curvature, and the second turn at 90 degrees to correct the anatomical position. | |||
{How many cavities does the mammalian "placental" cloaca have and in what groups of vertebrates is the cloaca only a single cavity?: | |||
|type="()"} | |||
+ Placental mammalian can have two or three seperate orifices for evacuation. Birds, reptiles, amphibians and some other mammals have only one. | |||
- All animals only have one opening called a cloaca for the urinary, digestive and reproductive tracts. | |||
- All animals have two openings, one for the urinary/digestive tract and the other for the reproductive tract. | |||
- All mammals and reptiles have two openings one for the urinary/digestive tract and the other for the reproductive tract. | |||
||All amphibians, birds, reptiles, and a few mammals (monotremes, tenrecs, golden moles, and marsupial moles) have only a cloaca, from which they excrete both urine and feces; this is in contrast to most placental mammals, which have two or three separate orifices for evacuation. In the developing human embryo and placental mammal embryo the hindgut (cloaca) will later be divided into separate urogenital and rectal regions that end at the cloacal membrane. | |||
{There are many different types of lumen abnormalities that can occur in the gastrointestinal tract. Indicate whether the following statement is true or false: | {There are many different types of lumen abnormalities that can occur in the gastrointestinal tract. Indicate whether the following statement is true or false: |
Revision as of 12:41, 2 September 2016
Lab 5: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
Lab 5 Online Assessment
TBA
Lab 4 Assessment
This is not this weeks assessment item, that will be added above.
Have a look at the range and type of questions that some of your peers set for the Quiz assessment.
- How many can you get right?
- What makes a good quiz question?
- When the answer is revealed, does the explanation provided help your understanding of the concept?
Student Quiz Questions |
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Lab 5: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
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Cite this page: Hill, M.A. (2024, April 26) Embryology ANAT2341 Lab 5 - Online Assessment. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/ANAT2341_Lab_5_-_Online_Assessment
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G