Question

Pregnancy Questions:

A) Where would you expect to find aromatase in the fetal-placental unit?

Select one:

a. Syncytiotrophoblast cells

b. Cytotrophoblast cells

c. The fetal adrenal glands

d. There is no aromatase expressed in either the placenta or fetus

B) Match the structure with the cells or groups of cells from which it develops.

Structures:

- yolk sac

- amnion

- nervous system

- embryo as a whole

- chorion

Cells/Groups of Cells to choose from:

- Embryonic ectoderm

- Extraembryonic mesoderm and extraembryonic endoderm

- Extraembryonic mesoderm and extraembryonic ectoderm

- Inner cell mass

- Extraembryonic mesoderm and trophoblast cells

Answer 1

Aromatase enzyme is found inside the feto-placental unit. It is an enzyme which converts testosterone into estradiol. This enzyme is present in the syncytiotrophoblast layer of placenta which is also called as Hormone factory of placenta

1. Embryo is the earlier form of fetus. It has all the cells which are required for organogenesis, layers, etc. It is derived from inner cell mass.
2. Nervous system is derived from the neuroectodermal tissue which is embryonic ectoderm.
3. Chorion develops from the extraembryonic mesoderm and trophoblast surrounding it. It gives rise to chorionic villi which transfers the nutrients from maternal blood to fetus.
4. Yolk sac extraembryonic mesoderm and extraembryonic endoderm. It acts as a source of stem cells and blood cells.
5. Amnion develops from the extraembryonic mesoderm and extraembryonic ectoderm. It contains amniotic fluid which provide nutrients, act as shock absorber, etc.