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Embryo Development

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Questions and Answers

Which cells secrete metalloproteases (MMPs) in the early stages of Day 5-9?

Uterine epithelial cells

Cytotrophoblasts (correct)

Decidua cells

Syncytiotrophoblasts

What happens to the cytotrophoblasts once they reach the decidua?

They differentiate into syncytiotrophoblasts (correct)

They lose their cell membranes

They implant into the uterine epithelium

They break down the material between the uterine epithelial cells

How can you distinguish between cytotrophoblasts and syncytiotrophoblasts?

Cytotrophoblasts lose their cell membranes (correct)

Cytotrophoblasts are green cells

Syncytiotrophoblasts are green cells

Syncytiotrophoblasts break down material between uterine epithelial cells

What is the function of metalloproteases (MMPs) secreted by cytotrophoblasts?

<p>To break down material between uterine epithelial cells</p> Signup and view all the answers

Study Notes

Early Stages of Embryonic Development

Cytotrophoblasts secrete metalloproteases (MMPs) in the early stages of Day 5-9.

Cytotrophoblasts and Decidua

Once cytotrophoblasts reach the decidua, they proliferate and differentiate into syncytiotrophoblasts.

Distinguishing between Cytotrophoblasts and Syncytiotrophoblasts

Cytotrophoblasts are smaller, mononuclear cells with a high nuclear-to-cytoplasmic ratio, whereas syncytiotrophoblasts are larger, multinucleated cells with a low nuclear-to-cytoplasmic ratio.

Function of Metalloproteases (MMPs)

Metalloproteases (MMPs) secreted by cytotrophoblasts facilitate implantation by breaking down the extracellular matrix, allowing the embryo to invade the decidua.

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Description

Test your knowledge on the early stages of embryo development! This quiz will cover topics such as implantation, cytotrophoblasts, and syncytiotrophoblasts. Challenge yourself and learn more about the fascinating process of pregnancy.