ANAT2341 Lab 5 - Online Assessment

From Embryology
Lab 5: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment

Lab 5 Online Assessment


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. Not all questions are on the GIT.

  • How many can you get right?
  • How many of the questions are designed with the actual right answer?
  • What makes a good quiz question?
  • When the answer is revealed, does the explanation provided help your understanding of the concept?

Student Quiz Questions  

1 1. The splanchnic mesoderm does not contribute to:

blood vessels
smooth muscle

2 2. The correct order of blood supply for the foregut, midgut, and hindgut is:

inferior mesenteric artery, celiac artery, superior mesenteric artery
superior mesenteric artery, inferior mesenteric artery, celiac artery
celiac artery, superior mesenteric artery, inferior mesenteric artery
celiac artery, inferior mesenteric artery, superior mesenteric artery

3 3. Which of these statements is false?

The right hepatic bud will eventually form the right lobe of the liver.
The cloaca initially forms a common urogenital and gastrointestinal space.
Meckel's diverticulum is a common abnormality caused by failed degeneration of the vitelline duct during development.
The ventral mesentery is completely lost during development.

4 4. Which abnormality involves narrowing of the gastrointestinal tract lumen?


5 During Gastrulation, or gut formation, at the rostral and caudal end of the embryo which membrane breaks down first and when does it occur?:

  buccopharangeal membrane at 6 weeks
  cloacal membrane at 5 weeks
  buccopharangeal membrane at 4 weeks
  coacal membrane at 4 weeks

6 During Gastrulation which organ forms first after the heart tube, and at what week of embryo development does this occur?:

  Pancreas at 5 weeks
  Foregut of stomach at 6 weeks
  Liver at 4 weeks
  Kidneys at 5 weeks

7 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?:

  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

8 How many cavities does the mammalian "placental" cloaca have and in what groups of vertebrates is the cloaca only a single cavity?:

  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.

9 There are many different types of lumen abnormalities that can occur in the gastrointestinal tract. Indicate whether the following statement is true or false: Stenosis is a condition where the lumen is interrupted (or a passage in the body is usually abnormally closed or absent).


10 What 3 major body cavities does the coelomic cavity form?

Endoderm, Mesoderm, Ectoderm
Pericardial, pleural, peritoneal
Cranial cavity, Thoracic cavity, Abdominal cavity
Foregut, midgut, hindgut

11 Explain the vascular supply of the foregut, midgut and hindgut.

The foregut is supplied by the aorta. The midgut is supplied by the celiac artery. The hindgut is supplied by the inferior mesenteric artery.
The foregut is supplied by branches of the superior mesenteric artery. The midgut and the hindgut are both supplied by the inferior mesenteric artery.
The foregut is supplied by branches of the celiac artery. The midgut is supplied by branches of the superior mesenteric artery. The hindgut is supplied by branches of the inferior mesenteric artery.

12 Ladd's Bands are fibrous bands of peritoneal tissue that attach the cecum to the abdominal wall, creating a blockage in the duodenum. In what abnormality is this condition found?

In the malrotation of the intestine
Intestinal Aganglionosis
Meckel's Diverticulum

13 Which of the following structures does the ectoderm contribute to?

epithelium, mesentry, connective tissue
enteric nervous system
epithelium and smooth muscle
enteric nervous system, connective tissue, smooth muscle

14 What lies rostral in relation to the notochord?

the neural tube
the buccopharyngeal membrane
the mesoderm then endoderm

15 During Week 8- 10 (GA 10- 12 weeks):

neural crest migrates into the wall forms enteric nervous system
endoderm in the GIT wall proliferates
a second rotation (of 90 degrees) occurs on the longitudinal axis establishing the adult orientation of the stomach.
mesoderm within the dorsal mesogastrium form a long strip of cells adjacent to the forming stomach above the developing pancreas

16 Narrowing of a lumen such as the duodenum or the pylorus is also called:


17 The mesoderm undegoes segementation to form which of the following layers

paraxial, intermediate mesoderm and splanchnic mesoderm
paraxial, intermediate mesoderm and lateral plate mesoderm
paraxial, lateral plate mesoderm and somites
paraxial, lateral plate and splanchnic mesoderm

18 Which of the following events occurs in week 4 of gestational age.

Mesentry development
hepatic diverticulum development begins
Canalization occurs
Intestine herniation occurs

19 Which of the following are part of the adult foregut?

celiac artery, upper duodenum, liver
superior part anal canal, jejunum, liver
liver, superior mesenteric artery, cecum
inferior mesenteric artery, rectum, celiac artery

20 The lumen abnormality Atresia can be describe as:

Narrowing of the lumen
The formation of parallel lumens.
Interruption of the lumen
Inflammation of the meninges of the brain.

21 The level of the end of foregut and the begins of midgut is at the level of:

Between stomach and duodenum
Between duodenum and jejunum

22 Which of the following statement is WRONG?

The abdominal mesentery separated at birth.
The lumen enlargement of stomach before the positioning of stomach
Rectum and urinary tube had common space at first place then separated.

23 Which of the following statement is WRONG ?:

Definition between Primary and Secondary Villi is the presents of mesoderm in the villi
There are limited numbers of villi could be found on the chorion laeve at early stages of the embryo.
The umbilical vein and artery have no any interaction in the whole umbilical cord

24 Which of the following will become part of the placenta?:

Decidua placentalis
Decidua capsularis
Decidua parietalis

25 The incidence of Gastroschisis is:


26 There are three distinct portions of the GIT by the end of week 4.


27 The Gastrointestinal Tract does not function until after birth.


28 Intestinal Aganglionosis is a condition where:

There are bands crossing the duodenum causing obstruction.
There is improper closure and absorption of the vitelline duct during development
There is an absence of the ENS within the GIT.
There is a narrowing of the lumen of the GIT.

29 Which of the following statements are true?

The paraxial mesoderm will form cardiovascular structures such as the heat and GIT strucutes
The intermediate mesoderm will form the body wall
The lateral plate mesoderm will form structures such as the stomach and small intestine
The intermediate mesoderm will form somites

30 What day are the first pair of somites formed and how many pairs of somites are formed altogether

Day 19 and 40 pairs of somites
Day 22 and 43 pairs of somites
Day 21 and 41 pairs of somites
Day 20 and 44 pairs of somites

31 The sclerotome will form:

a single vertebral body and intervertebral disc after being subdivided
Dermatomes across the whole body
Skeletal muscles of the back (erector spinae) as well as those of the thorax and abdomen
The overlying epidermial layer of the skin

32 Which of the following is false:

Neural crest cells will form skin melanocytes
Neural crest cells will form the neural tube
Neural crest cells will form teeth odontoblasts
Neural crest cells will form the pia-arachnoid sheath

33 The first organ to form after the development of the heart is the:

Gall Bladder.

34 How many rotations does the stomach undergo during GIT development in week 4 to 5?


35 Following the degeneration of the buccopharyngeal membrane, the foregut is open to which cavity?

The peritoneal cavity
The chorionic cavity
The yolk sac
The amniotic cavity

36 Which one of these is not an abnormality that can occur during the proliferation and re-canalisation of the gut tube?

Meckel's diverticulum

37 During week 4 in GIT development:

The cloacal membrane is broken down while the buccopharyngeal membrane remains intact
The buccopharyngeal membrane is broken down while the cloacal membrane remains intact
Both the buccopharyngeal and cloacal membranes break down simultaneously
Both the buccopharyngeal and cloacal membranes remain intact.

38 1. Which of the following options lists the order of events that happen at different stages in liver development of an embryo?

Cell differentiation, hepatic diverticulum development, enmeshing stromal capillaries
Hepatic diverticulum development, septum transversum forming liver stroma, epithelial cord profileration
Hepatic diverticulum, development, epithelial cord proliferation, formation of hepatic trabeculae
Cell differentiation, epithelial cord proliferation, formation of liver stroma

39 2. Where does the mesoderm lie in relation to the notochord?

Dorsally & Ventrally
Laterally, Rostrally & Ventrally

40 3. The process of ‘canalization’ that occurs at the endoderm of GIT wall from beginning of week 5 includes:

Endoderm in the GIT wall proliferates, blockage of GIT endoderm lumen occurs, tissue degenerates to form a hollow tube once more
The dorsal border of the tube where stomach will form in the embryo, begins to dilate and form an enlarged lumen
Midgut grows in length as a loop extending ventrally, returning as hindgut
At the level of stomach, dorsal mesogastrium extends as a fold forming the greater omentum

41 4. In both the fetus and the adult, the celiac artery supplies:

Fetus: Foregut /Adult: Appendix
Fetus: Midgut /Adult: Respiratory tract
Fetus: Foregut /Adult: Esophagus
Fetus: Hindgut/Adult: Rectum

42 The mesoderm consists of epithelium, connective tissues, blood vessels, mesentry, smooth muscle.


43 Select the most correct option of the following options:

  The superior mesenteric artery supplies the hindgut
  The foregut is suppled by the inferior mesenteric artery
  The celiac artery supplies the midgut
  The superior mesenteric artery supplies the midgut

44 Which of the following statements about somites is/are correct:

  Differentiate a covering epithelium in their early stages.
  Somites contribute the body wall osteogenic, chrondrogenic and fibrogenic cells.
  Contribute to a single vertebral level body and the intervertebral disc.
  Myotomes contribute the smooth muscle associated with the gastrointestinal tract wall.

Lab 5: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment

ANAT2341 Course Timetable  
Week (Mon) Lecture 1 (Mon 1-2pm) Lecture 2 (Tue 3-4pm) Practical (Fri 1-3pm)
Week 2 (1 Aug) Introduction Fertilization Lab 1
Week 3 (8 Aug) Week 1 and 2 Week 3 Lab 2
Week 4 (15 Aug) Mesoderm Ectoderm Lab 3
Week 5 (22 Aug) Early Vascular Placenta Lab 4
Week 6 (29 Aug) Gastrointestinal Respiratory Lab 5
Week 7 (5 Sep) Head Neural Crest Lab 6
Week 8 (12 Sep) Musculoskeletal Limb Development Lab 7
Week 9 (19 Sep) Renal Genital Lab 8
Mid-semester break
Week 10 (3 Oct) Public Holiday Stem Cells Lab 9
Week 11 (10 Oct) Integumentary Endocrine Lab 10
Week 12 (17 Oct) Heart Sensory Lab 11
Week 13 (24 Oct) Fetal Birth and Revision Lab 12

ANAT2341 2016: Moodle page | ECHO360 | Textbooks | Students 2016 | Projects 2016

ANAT2341Lectures - Textbook chapters  
Lecture (Timetable) Textbook - The Developing Human Textbook - Larsen's Human Embryology
Embryology Introduction Introduction to the Developing Human
Fertilization First Week of Human Development Gametogenesis, Fertilization, and First Week
Week 1 and 2 Second Week of Human Development Second Week: Becoming Bilaminar and Fully Implanting
Week 3 Third Week of Human Development Third Week: Becoming Trilaminar and Establishing Body Axes
Mesoderm Fourth to Eighth Weeks of Human Development Fourth Week: Forming the Embryo
Ectoderm Nervous System Development of the Central Nervous System
Early Vascular Cardiovascular System Development of the Vasculature
Placenta Placenta and Fetal Membranes Development of the Vasculature
Endoderm - GIT Alimentary System Development of the Gastrointestinal Tract
Respiratory Respiratory System Development of the Respiratory System and Body Cavities
Head Pharyngeal Apparatus, Face, and Neck Development of the Pharyngeal Apparatus and Face
Neural Crest Nervous System Development of the Peripheral Nervous System
Musculoskeletal Muscular System Development of the Musculoskeletal System
Limb Development of Limbs Development of the Limbs
Renal Urogenital System Development of the Urinary System
Genital Urogenital System Development of the Urinary System
Stem Cells
Integumentary Integumentary System Development of the Skin and Its Derivatives
Endocrine Covered through various chapters (see also alternate text), read head and neck, neural crest and renal chapters.
Endocrinology Textbook - Chapter Titles  
Nussey S. and Whitehead S. Endocrinology: An Integrated Approach (2001) Oxford: BIOS Scientific Publishers; ISBN-10: 1-85996-252-1.

Full Table of Contents

Heart Cardiovascular System Development of the Heart
Sensory Development of Eyes and Ears Development of the Eyes
Fetal Fetal Period Fetal Development and the Fetus as Patient
Birth and Revision
Additional Textbook Content - The following concepts also form part of the theory material covered throughout the course.
  1. Principles and Mechanisms of Morphogenesis and Dysmorphogenesis
  2. Common Signaling Pathways Used During Development
  3. Human Birth Defect

Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

Cite this page: Hill, M.A. (2021, June 24) Embryology ANAT2341 Lab 5 - Online Assessment. Retrieved from

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© Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G