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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