Placenta Quiz and Flashcards for Ninja Nerds

Questions and Answers

Which part of the placenta regresses during week 20?

Chorion

What hormone is not produced by the placenta?

Thyroid hormone

During which week do primary chorionic villi develop?

Week 1

Which part of the decidua has no fetal involvement?

Decidua parietalis Signup and view all the answers

Which medication is not given for toxoplasmosis?

Rhogam Signup and view all the answers

What does not take part in forming a tight attachment?

Chemokines Signup and view all the answers

What is the primary function of estrogen and progesterone during pregnancy?

Thicken the endometrial lining Signup and view all the answers

How does human placental lactogen affect insulin release from the pancreas?

Increases insulin resistance in the mother's cells Signup and view all the answers

Which hormone is essential for lung development and surfactant production in infants?

Cortisol Signup and view all the answers

What is the consequence of inadequate cortisol production in premature infants?

Collapsed alveoli resulting in respiratory distress syndrome Signup and view all the answers

How does relaxin contribute to the birthing process?

Relaxes ligaments of the pubic symphysis Signup and view all the answers

What is the main role of thyroid hormone during pregnancy?

Promote CNS development in infants Signup and view all the answers

What is the primary metabolic function of gas exchange mentioned in the text?

Delivery of oxygen from the mother to the fetus Signup and view all the answers

Which layer interacts with the chorionic frondosum to form the placenta?

Decidua basalis Signup and view all the answers

What types of nutrients are delivered through active transport according to the text?

Fatty acids and amino acids Signup and view all the answers

Which layer of decidua is involved in fetal development?

Decidua capsularis Signup and view all the answers

What happens as the fetus grows according to the text?

Decidua capsularis merges with decidua parietalis Signup and view all the answers

What nutrient is primarily transferred from the fetus to the mother?

Fatty acids Signup and view all the answers

What is the role of integrins in the attachment process described in the text?

Stabilizing the connection between trophoblastic cells and endometrium Signup and view all the answers

What is the function of the syncytiotrophoblast in the post-implantation stage?

Releases hydrolytic enzymes to invade the stromal tissue Signup and view all the answers

What is the primary function of the primary yolk sac in week 1 development?

Differentiation into epiblast and hypoblast Signup and view all the answers

Why do lacunar spaces become intervillous spaces during implantation?

To allow blood to seep in from broken blood vessels Signup and view all the answers

Which cell type releases Human Chorionic Gonadotropin hormone (hCG) post-implantation?

Syncytiotrophoblast Signup and view all the answers

What is the main function of Selectins during implantation?

Breaking down the stromal tissue of endometrium Signup and view all the answers

What is the purpose of the tertiary villi branching out in the placenta development?

To increase the surface area for exchange Signup and view all the answers

What are the main components exchanged from the fetus to the mother through the placenta?

Carbon dioxide and waste products Signup and view all the answers

Which structure in the placenta is formed from the continuation of extraembryonic mesoderm in the umbilical cord?

Chorionic fondosum Signup and view all the answers

What happens around weeks 16-20 in placental development?

Placental septa form to separate the tertiary villi into cotyledons Signup and view all the answers

What is the function of the decidua in placental development?

To fill up with glycogen and lipids as pregnancy progresses Signup and view all the answers

Where does gas exchange primarily occur in the placenta?

Across the tertiary villi between fetal and maternal blood Signup and view all the answers

Study Notes

Placenta Development

The chorion frondosum regresses during week 20.
Aldosterone is not produced by the placenta.
Primary chorionic villi develop during week 3.
The decidua parietalis has no fetal involvement.

Hormones and Functions

Estrogen and progesterone regulate pregnancy and facilitate fetal growth.
Human placental lactogen increases insulin resistance by reducing insulin release from the pancreas.
Thyroid hormone is essential for lung development and surfactant production in infants.
Cortisol production is necessary for fetal lung development, and inadequate production can lead to respiratory distress in premature infants.

Placental Functions

Gas exchange primarily occurs in the intervillous spaces.
The syncytiotrophoblast is responsible for the initial attachment to the uterus and later facilitates gas exchange.
Integrins enable the attachment of the blastocyst to the uterine epithelium.
The primary yolk sac plays a crucial role in nutrition during week 1 development.

Fetal Development and Placenta

The decidua basalis is involved in fetal development.
As the fetus grows, the placenta increases in size and becomes more complex.
The placenta primarily transfers oxygen and nutrients from the mother to the fetus, while also removing waste products.
The fetus primarily transfers carbon dioxide and waste products to the mother.

Development and Structure

The lacunar spaces become intervillous spaces during implantation, enabling gas exchange.
The syncytiotrophoblast releases Human Chorionic Gonadotropin hormone (hCG) post-implantation.
Selectins facilitate the attachment of the blastocyst to the uterine epithelium.
The tertiary villi branching out in the placenta increases the surface area for gas exchange.
The umbilical cord is formed from the continuation of extraembryonic mesoderm.
Around weeks 16-20, the placenta undergoes significant growth and development.

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Description

Test your knowledge on blastocyst anatomy and the hormonal functions of the placenta. Identify parts of the blastocyst, hormones secreted by the syncytiotrophoblast, and more.

Ninja Nerd- Placenta