Biology

Embryonic Development

572 Questions

Embryonic development questions cover the biological processes of gamete fusion, germ layer formation, and fetal maturation. The focus lies in identifying extraembryonic structures, trophoblast functions, and sequential developmental stages. This specialized topic appears regularly in biology screening tests and medical entrance examinations.

Germ layer formationBlastocyst implantationExtraembryonic structuresFetal development stagesReproductive physiology

Embryonic Development Questions

Multiple choice

What is the term used to describe the small white strands that extend from the yolk to the eggshell?

  1. Chalazae

  2. Albumen

  3. Vitelline membrane

  4. Eggshell membrane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chalazae are the small, twisted strands of egg white that extend from the yolk to the eggshell. They help keep the yolk centered and prevent it from sticking to the eggshell.

Multiple choice

What is the most common type of spina bifida?

  1. Myelomeningocele

  2. Meningocele

  3. Lipomeningocele

  4. Spina bifida occulta
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Myelomeningocele is the most common type of spina bifida, accounting for about 85% of cases. It is a severe birth defect in which the spinal cord and its protective membranes protrude through an opening in the back.

Multiple choice

What is the term for a double-yolked egg?

  1. Double yolk

  2. Twin egg

  3. Conjoined egg

  4. Joined egg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A double-yolked egg is an egg that contains two yolks instead of one.

Multiple choice

What is the scientific term for the air pocket found at the end of an egg?

  1. Air cell

  2. Chalazae

  3. Albumen

  4. Vitelline membrane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The air cell is a small pocket of air found at the end of an egg, which helps to cushion the yolk and prevent it from sticking to the shell.

Multiple choice

What is the term used to describe the fertilized egg?

  1. Zygote

  2. Embryo

  3. Fetus

  4. Neonate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fertilized egg is called a zygote, which then develops into an embryo and later a fetus.

Multiple choice

What is the most common type of abdominal wall defect?

  1. Omphalocele

  2. Gastroschisis

  3. Diaphragmatic hernia

  4. Ectopia cordis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gastroschisis is the most common type of abdominal wall defect, occurring in about 1 in 2000 births.

Multiple choice

What is the most common type of neuroblastoma?

  1. Abdominal neuroblastoma

  2. Thoracic neuroblastoma

  3. Pelvic neuroblastoma

  4. Cervical neuroblastoma
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Abdominal neuroblastoma is the most common type of neuroblastoma, accounting for approximately 60% of all cases.

Multiple choice

What is the most common type of neuroblastoma?

  1. Stage 1

  2. Stage 2

  3. Stage 3

  4. Stage 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stage 4 is the most common type of neuroblastoma.

Multiple choice

What is the most common type of Wilms tumor?

  1. Favorable histology

  2. Anaplastic histology

  3. Mixed histology

  4. Teratoid histology
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Favorable histology is the most common type of Wilms tumor.

Multiple choice

What is the most common type of hepatoblastoma?

  1. Mixed epithelial-mesenchymal

  2. Pure epithelial

  3. Pure mesenchymal

  4. Anaplastic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mixed epithelial-mesenchymal is the most common type of hepatoblastoma.

Multiple choice

What are the long-term effects of IUGR?

  1. Increased risk of chronic diseases

  2. Neurodevelopmental problems

  3. Both of the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IUGR can increase the risk of chronic diseases, such as heart disease, stroke, and diabetes, as well as neurodevelopmental problems, such as cerebral palsy and intellectual disability.

Multiple choice

Where are stem cells found?

  1. In embryos

  2. In umbilical cord blood

  3. In bone marrow

  4. In all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stem cells can be found in embryos, umbilical cord blood, bone marrow, and other tissues. Embryonic stem cells are the most versatile, but they are also the most controversial due to ethical concerns.

Multiple choice

What is the main difference between embryonic stem cells and induced pluripotent stem cells?

  1. Embryonic stem cells are derived from embryos, while induced pluripotent stem cells are derived from adult cells

  2. Embryonic stem cells are more versatile than induced pluripotent stem cells

  3. Induced pluripotent stem cells are more difficult to obtain than embryonic stem cells

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The main difference between embryonic stem cells and induced pluripotent stem cells is that embryonic stem cells are derived from embryos, while induced pluripotent stem cells are derived from adult cells.

Multiple choice

What is the outermost layer of an egg called?

  1. Yolk

  2. Albumen

  3. Shell

  4. Chalazae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The shell is the hard, protective outer layer of an egg.

Multiple choice

Which part of the egg is responsible for providing nutrients to the developing embryo?

  1. Yolk

  2. Albumen

  3. Shell

  4. Chalazae
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The yolk is responsible for providing nutrients to the developing embryo.