Discover the Fascinating World of Twins
87 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of twins arise from 1 fertilized egg that splits in early pregnancy?

  • Dizygotic twins
  • Monozygotic twins (correct)
  • Identical twins
  • Fraternal twins

What determines chorionicity and amnionicity in monozygotic twins?

  • The number of eggs fertilized
  • The number of placentas
  • The timing of splitting (correct)
  • The number of amniotic sacs

Which condition occurs in monochorionic twin gestations?

  • Fraternal twins
  • Twin-Twin Transfusion Syndrome (TTTS) (correct)
  • Monozygotic twins
  • Dizygotic twins

Which structure is derived from the ectoderm in the pharyngeal apparatus?

<p>Pharyngeal clefts (B)</p> Signup and view all the answers

What is the consequence of the failure of the urachus to involute?

<p>Development of an adenocarcinoma (A)</p> Signup and view all the answers

Which structure is associated with the development of the middle ear cavity and eustachian tube?

<p>1st pharyngeal pouch (B)</p> Signup and view all the answers

What is the consequence of the partial failure of the vitelline duct to obliterate?

<p>Formation of a Meckel diverticulum (A)</p> Signup and view all the answers

Which structure is formed by the obliterated urachus after birth?

<p>Median umbilical ligament (C)</p> Signup and view all the answers

What is the consequence of the failure of the vitelline duct to obliterate?

<p>Patent vitelline duct (B)</p> Signup and view all the answers

Which structure is associated with a persistent cervical sinus and presents as a lateral neck mass anterior to the sternocleidomastoid muscle?

<p>Pharyngeal cleft cyst (B)</p> Signup and view all the answers

Which structure contributes to the development of the thymus and the inferior parathyroids?

<p>3rd pharyngeal pouch (D)</p> Signup and view all the answers

What is the consequence of the partial failure of the urachus to involute?

<p>Urachal cyst (C)</p> Signup and view all the answers

Which structure is derived from the endoderm in the pharyngeal apparatus?

<p>Pharyngeal pouch (A)</p> Signup and view all the answers

What is the consequence of the total failure of the vitelline duct to obliterate?

<p>Patent vitelline duct (B)</p> Signup and view all the answers

Which structure gives rise to the epithelial lining of the palatine tonsil?

<p>2nd pharyngeal pouch (D)</p> Signup and view all the answers

Which structure is an outpouching of the ileum and may contain heterotopic gastric and/or pancreatic tissue?

<p>Meckel diverticulum (D)</p> Signup and view all the answers

Which structure is derived from the mesoderm and neural crest in the pharyngeal apparatus?

<p>Pharyngeal arch (C)</p> Signup and view all the answers

Which type of twins always result in 2 zygotes?

<p>Dizygotic twins (C)</p> Signup and view all the answers

What determines chorionicity and amnionicity in monozygotic twins?

<p>The timing of splitting (D)</p> Signup and view all the answers

Which type of twins result from 1 fertilized egg that splits in early pregnancy?

<p>Monozygotic twins (B)</p> Signup and view all the answers

Which condition occurs in monochorionic twin gestations?

<p>Twin-Twin Transfusion Syndrome (TTTS) (B)</p> Signup and view all the answers

What is the consequence of the failure of the urachus to involute?

<p>Urachal cyst (C)</p> Signup and view all the answers

Which vessels return deoxygenated blood from the fetal internal iliac arteries to the placenta?

<p>Umbilical arteries (A)</p> Signup and view all the answers

Which vessels supply oxygenated blood from the placenta to the fetus?

<p>Umbilical vein (A)</p> Signup and view all the answers

What is a single umbilical artery (2-vessel cord) associated with?

<p>Congenital and chromosomal anomalies (A)</p> Signup and view all the answers

What structure forms from the allantois?

<p>Urachus (A)</p> Signup and view all the answers

What is the consequence of the partial failure of the vitelline duct to obliterate?

<p>Urachal cyst (D)</p> Signup and view all the answers

Dizygotic twins always result in 2 zygotes.

<p>True (A)</p> Signup and view all the answers

Monozygotic twins arise from 2 fertilized eggs.

<p>False (B)</p> Signup and view all the answers

Monozygotic twins can have separate amniotic sacs.

<p>True (A)</p> Signup and view all the answers

Monozygotic twins can have separate placentas.

<p>False (B)</p> Signup and view all the answers

Monozygotic twins can be conjoined.

<p>True (A)</p> Signup and view all the answers

Twin-Twin Transfusion Syndrome occurs in monozygotic twin gestations.

<p>True (A)</p> Signup and view all the answers

TTTS is caused by abnormal connections between blood vessels in the placenta.

<p>True (A)</p> Signup and view all the answers

The donor twin in TTTS experiences hypervolemia.

<p>False (B)</p> Signup and view all the answers

A single umbilical artery is associated with congenital and chromosomal anomalies.

<p>True (A)</p> Signup and view all the answers

The umbilical arteries and vein are derived from the allantois.

<p>True (A)</p> Signup and view all the answers

True or false: The urachus is a duct between the fetal bladder and umbilicus.

<p>True (A)</p> Signup and view all the answers

True or false: The obliterated urachus is represented by the median umbilical ligament.

<p>True (A)</p> Signup and view all the answers

True or false: A patent urachus can result in urine discharge from the umbilicus.

<p>True (A)</p> Signup and view all the answers

True or false: A urachal cyst is a fluid-filled cavity lined with uroepithelium between the umbilicus and bladder.

<p>True (A)</p> Signup and view all the answers

True or false: A vesicourachal diverticulum is an outpouching of the bladder.

<p>True (A)</p> Signup and view all the answers

True or false: The vitelline duct connects the yolk sac to the midgut lumen during fetal development.

<p>True (A)</p> Signup and view all the answers

True or false: A patent vitelline duct can result in meconium discharge from the umbilicus.

<p>True (A)</p> Signup and view all the answers

True or false: A vitelline duct cyst can lead to volvulus, which can cause complications.

<p>True (A)</p> Signup and view all the answers

True or false: A Meckel diverticulum is an outpouching of the ileum.

<p>True (A)</p> Signup and view all the answers

True or false: The pharyngeal apparatus is composed of pharyngeal clefts, arches, and pouches.

<p>True (A)</p> Signup and view all the answers

Dizygotic twins always result in 2 zygotes.

<p>True (A)</p> Signup and view all the answers

Monozygotic twins can be conjoined.

<p>True (A)</p> Signup and view all the answers

TTTS occurs in monochorionic twin gestations.

<p>True (A)</p> Signup and view all the answers

A single umbilical artery (2-vessel cord) is associated with congenital and chromosomal anomalies.

<p>True (A)</p> Signup and view all the answers

The umbilical arteries and vein are derived from the allantois.

<p>True (A)</p> Signup and view all the answers

The allantois forms from the yolk sac.

<p>True (A)</p> Signup and view all the answers

The vitelline duct connects the yolk sac to the midgut lumen during fetal development.

<p>True (A)</p> Signup and view all the answers

A patent vitelline duct can result in meconium discharge from the umbilicus.

<p>True (A)</p> Signup and view all the answers

A vitelline duct cyst can lead to volvulus, which can cause complications.

<p>True (A)</p> Signup and view all the answers

A urachal cyst is a fluid-filled cavity lined with uroepithelium between the umbilicus and bladder.

<p>True (A)</p> Signup and view all the answers

The urachus is a duct between the fetal bladder and umbilicus.

<p>True (A)</p> Signup and view all the answers

The obliterated urachus is represented by the median umbilical ligament.

<p>True (A)</p> Signup and view all the answers

A patent urachus can result in urine discharge from the umbilicus.

<p>True (A)</p> Signup and view all the answers

A vesicourachal diverticulum is an outpouching of the bladder.

<p>True (A)</p> Signup and view all the answers

The vitelline duct connects the yolk sac to the midgut lumen during fetal development.

<p>True (A)</p> Signup and view all the answers

A patent vitelline duct can result in meconium discharge from the umbilicus.

<p>True (A)</p> Signup and view all the answers

A vitelline duct cyst can lead to volvulus, which can cause complications.

<p>True (A)</p> Signup and view all the answers

A Meckel diverticulum is an outpouching of the ileum.

<p>True (A)</p> Signup and view all the answers

Pharyngeal clefts are derived from ectoderm.

<p>True (A)</p> Signup and view all the answers

Pharyngeal pouches are derived from endoderm.

<p>True (A)</p> Signup and view all the answers

Which type of twins arise from 1 fertilized egg that splits in early pregnancy?

<p>Monozygotic twins (B)</p> Signup and view all the answers

What is the result of splitting 8-12 days after fertilization in monozygotic twins?

<p>Shared chorion and amnion (B)</p> Signup and view all the answers

What is Twin-Twin Transfusion Syndrome (TTTS) characterized by?

<p>Unbalanced arteriovenous anastomoses between the twins (A)</p> Signup and view all the answers

What does the umbilical vein supply to the fetus?

<p>Oxygenated blood (B)</p> Signup and view all the answers

What is a single umbilical artery (2-vessel cord) associated with?

<p>Congenital and chromosomal anomalies (D)</p> Signup and view all the answers

What structure is derived from the allantois?

<p>Urachus (D)</p> Signup and view all the answers

What is the function of the vitelline duct during fetal development?

<p>Connects the yolk sac to the midgut lumen (B)</p> Signup and view all the answers

What is the result of splitting 4-8 days after fertilization in monozygotic twins?

<p>Shared chorion (C)</p> Signup and view all the answers

What is the result of splitting 13+ days after fertilization in monozygotic twins?

<p>Shared chorion, amnion, and body (A)</p> Signup and view all the answers

What is the result of splitting 0-4 days after fertilization in monozygotic twins?

<p>Separate chorion and amnion (B)</p> Signup and view all the answers

Which embryonic structure gives rise to the parafollicular (C) cells of the thyroid?

<p>4th pharyngeal pouch (D)</p> Signup and view all the answers

What is the consequence of the partial failure of the vitelline duct to obliterate?

<p>Vitelline duct cyst (B)</p> Signup and view all the answers

Which structure is formed by the obliterated urachus after birth?

<p>Median umbilical ligament (A)</p> Signup and view all the answers

Which one of these is not derived from the endoderm in the pharyngeal apparatus?

<p>Palatine tonsil (A)</p> Signup and view all the answers

What is the consequence of the total failure of the urachus to involute?

<p>Patent urachus (A)</p> Signup and view all the answers

Which one of these is not a derivative of the pharyngeal clefts?

<p>Thyroid follicular cells (B)</p> Signup and view all the answers

Which one of these is not a consequence of the failure of the vitelline duct to obliterate?

<p>Pharyngeal cleft cyst (D)</p> Signup and view all the answers

Which one of these is not a consequence of the failure of the urachus to involute?

<p>Pharyngeal pouch cyst (A)</p> Signup and view all the answers

Which one of these is not a derivative of the 3rd pharyngeal pouch?

<p>Superior parathyroids (D)</p> Signup and view all the answers

Which one of these is not derived from the mesoderm and neural crest in the pharyngeal arches?

<p>Epithelial lining of the palatine tonsil (C)</p> Signup and view all the answers
Use Quizgecko on...
Browser
Browser