Fertilization and Cell Development

What structure sweeps the oocyte from the ovary into the Fallopian tube?

Within how many minutes does the fertilization membrane form after a sperm enters the egg?

What is the term for the series of mitotic divisions that occur after fertilization?

Approximately how many days after fertilization does the zygote develop into a morula?

In human development, what structure implants into the endometrium approximately 7 days after fertilization?

Which of the following structures is formed by the trophoblast?

What is the inner cell mass (ICM) known as after implantation?

Which of the following marks the beginning of the Gastrula Stage in embryonic development?

What structure is the solid ball of blastomeres?

What is the cavity inside the blastocyst called?

What two layers is the endometrium divided into after implantation?

Which of the following structures provides the structural basis for the umbilical cord?

Which primary germ layer gives rise to the epidermis, nervous system, and organs of special senses?

Which primary germ layer gives rise to the GI Tract, urinary tract, liver, gallbladder, pancreas, thyroid, thymus and parathyroid?

Which of the following organs is derived from the mesoderm?

What is the role of the amnion in embryonic development?

Which of the extraembryonic membranes is responsible for providing the embryo's first blood cells?

What is the correct chronological order of the following stages of early embryonic development: morula, zygote, blastocyst, gastrula?

Why is the formation of the fertilization membrane important?

How do trophoblast cells contribute to implantation?

After implantation, what happens to the trophoblast cells?

What is the primary role of the yolk sac during early human embryonic development?

You're examining a sample under a microscope and observe a solid ball of approximately 32 cells. Based on your knowledge of human development, what stage is this most likely to be?

What process do the trophoblast cells use to penetrate the endometrium?

If the ectoderm failed to develop properly during gastrulation, which of the following systems would be MOST affected?

Which of the following is the most accurate description of the gastrula stage?

A researcher is studying the effects of certain toxins on early embryonic development. They observe that the allantois is severely malformed in the exposed embryos. What is the MOST likely long-term consequence of this defect?

A woman is diagnosed with a condition that prevents the formation of the fertilization membrane. What is the MOST likely immediate consequence of this condition if fertilization were to occur?

A certain drug is known to inhibit the secretion of enzymes by trophoblast cells. What specific process in early embryonic development would be MOST directly affected by this drug?

If the mesoderm layer of an embryo failed to properly differentiate, which of the following structures would NOT develop correctly?

Which of the following mechanisms plays the MOST direct role in preventing polyspermy?

After fertilization, the zygote undergoes rapid cell division without an increase in overall size. What is this process called?

What is the correct order of events leading to implantation?

A scientist discovers a compound that prevents the formation of the allantosis. Which function of the developing embryo would be most immediately affected?

During gastrulation, a critical signaling error causes a complete failure of mesoderm formation. Which of the following structures would be MOST affected by this error?

Consider a developing embryo where a genetic mutation prevents the proper folding and migration of cells during gastrulation. If the endoderm layer failed to form correctly, which of the following processes would be MOST directly compromised?

A researcher is designing a drug that will prevent implantation of a blastocyst but wants to minimize side effects on the mother. Which of the following mechanisms would be the MOST specific and effective target for this drug?

In a hypothetical scenario, researchers succeed in creating artificial trophoblast cells that, while structurally sound, are incapable of secreting Human Chorionic Gonadotropin (hCG). How would this MOST directly impact early pregnancy?