embryology jeopardy questions

Question 1

At age 6, all future gametes in the testis are?

Answer 1

primordial germ cells

Question 2

What is the cell that leaves the ovary called?

Answer 2

secondary oocyte – arrested in metaphase 2

Question 3

Development of the primitive gonads into testes or ovaries is induced by invasion of the developing gonads by the primordial germ cells. The cells migrate from which of the following locations?

Answer 3

Yolk sac

Question 4

During oogenesis, when would all the primary oocytes be expected to enter meiosis 2?

Answer 4

During the 5th month of development

Question 5

Fertilization normally occurs at which location?

Answer 5

Ampulla (distal end of the uterine tube)

Question 6

What event would indicate that fertilization has taken place?

Answer 6

Formation of the second barr body at the end of meiosis 2 (no longer arrested in metaphase 2)

Question 7

If you were trying to design a contraceptive agent targeting the ability of spermatozoa to fertilize an ovum, what possible avenue could you take?

Answer 7

Develop an agent that blocks the spermatozoa cell-surface receptors to the zona pellucida

Question 8

During the first week of development, there was a failure of the blastocyst to begin implantation, what might have caused this?

Answer 8

Breakdown of the zona pellucida

Question 9

A 28-year-old woman who does not know she is pregnant undergoes a chemotherapy treatment at the end of her first week of pregnancy. This particular chemotherapy treatment is associated with slowing the rate of development in exposed cells, which is good in cancer treatment. However, this treatment may also have a negative influence on the implantation and growth of an embryo – which layer would a slowed rate of development most likely hinder implantation?

Answer 9

Synctiotrophoblast

Question 10

The amniotic cavity forms within what structure?

Answer 10

Epiblast

Question 11

Lacunar Networks develop within what during the second week?

Answer 11

Synctiotrophoblast

Question 12

What do primary villi develop from?

Answer 12

Cytotrophoblast

Question 13

What produces hCG?

Answer 13

Synctiotrophoblast of the placenta

Question 14

Primordial blood cells of the 3 week embryo first begin to form where?

Answer 14

In the yolk sac

Question 15

Which tissue or structure is responsible for synthesizing and secreting progesterone until the placenta takes on this role?

Answer 15

Corpus Luteum

Question 16

In a day 15 embryo, what cell lines can the epiblast form?

Answer 16

Ectoderm, mesoderm, endoderm

Question 17

What are the components of the definitive chorion?

Answer 17

extraembryonic somatic mesoderm, cytotrophoblast, and synctiotrophoblast

Question 18

What happens in gastrulation?

Answer 18

Embryo connects to uterus by umbilical cord; Blastula fold onwards and the 4 layers form – primitive steak forms along the caudal half of the dorsal midline axis of the embryo

Question 19

what does the hypoblast give rise to?

Answer 19

Heuser’s Membrane

Question 20

What is Kartagener syndrome?

Answer 20

Inherited defect of dynein arm, which is necessary for ciliary movement.

Associated with sinusitis, infertility (poor motility of sperm), situs inversus – increased risk of ectopic pregnancy