Human Embryology Quiz

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Questions and Answers

What is the primary hormone responsible for inducing uterine contractions during parturition?

  • Estrogen
  • Relaxin
  • Oxytocin (correct)
  • Progesterone

At what month does the heart form during embryonic development?

  • Month 1 (correct)
  • Month 3
  • Month 4
  • Month 2

Which layer of the embryo gives rise to the nervous system and skin?

  • Endoderm
  • Mesoderm
  • Ectoderm (correct)
  • Somatoderm

What significant development occurs during the fifth month of pregnancy?

<p>Fetal movements and hair appearance (B)</p> Signup and view all the answers

What is the average gestation period for humans?

<p>9 months (A)</p> Signup and view all the answers

What is the primary function of the placenta during pregnancy?

<p>To exchange oxygen and nutrients for waste products between the mother and embryo. (D)</p> Signup and view all the answers

Which hormone is NOT produced by the placenta?

<p>Testosterone (D)</p> Signup and view all the answers

What connects the placenta to the embryo?

<p>The umbilical cord (B)</p> Signup and view all the answers

What happens to the inner cell mass of the embryo immediately after implantation?

<p>It undergoes differentiation. (C)</p> Signup and view all the answers

Which statement about chorionic villi is accurate?

<p>Chorionic villi increase the surface area for nutrient exchange. (A)</p> Signup and view all the answers

Flashcards

Placenta function

The placenta facilitates oxygen and nutrient delivery to the embryo, and removes carbon dioxide and waste products.

Chorionic villi

Finger-like projections on the trophoblast that form the placenta.

Umbilical cord

Connects the embryo to the placenta for transporting nutrients/oxygen and waste removal.

Implantation

The process where the embryo attaches to the uterine wall.

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Placental hormones

Hormones like hCG, hPL, estrogens, progestogens, and relaxin, produced by the placenta; crucial for pregnancy.

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Gestation Period

The time during which a fetus develops in the uterus.

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Parturition

Childbirth, the process of delivering a baby.

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Oxytocin

Hormone that triggers uterine contractions during childbirth.

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Lactation

Production of milk by mammary glands.

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Embryonic Development

The process of growth and development of the embryo during pregnancy.

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