Developmental Biology: Morula and Blastula Stages
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Questions and Answers

What characterizes the first trimester of embryonic development?

  • Development of the placenta
  • Onset of fetal movements
  • Formation of essential organs (correct)
  • Growth of the fetus

    • What is the main role of oxytocin during labor?

  • Stimulating the uterus to contract (correct)
  • Helping with milk production post-delivery
  • Inducing hormonal changes for birth
  • Causing dilation of the cervix

    • Which process involves unspecialized embryonic cells transforming into specialized cells, tissues, and organs?

  • Growth
  • Expulsion
  • Differentiation (correct)
  • Hormonal induction

    • What marks the beginning of the second trimester of pregnancy?

    <p>Maternal ability to feel fetal movements</p> Signup and view all the answers

    What is the main function of the placenta during embryonic development?

    <p>Absorb food and oxygen from the mother's blood</p> Signup and view all the answers

    Which stage of labor involves the delivery of the placenta?

    <p>Expulsion</p> Signup and view all the answers

    What is the key characteristic of the morula stage in embryonic development?

    <p>Formation of a solid ball of cells</p> Signup and view all the answers

    Which event occurs during the gastrulation phase of embryonic development?

    <p>Development of ectoderm, endoderm, and mesoderm layers</p> Signup and view all the answers

    Which process leads to the development of a blastocyst from the morula?

    <p>Epithelial cellular layer formation around the morula</p> Signup and view all the answers

    What is the role of human chorionic gonadotropin (hCG) in embryonic development?

    <p>To prevent menstruation and initiate pregnancy</p> Signup and view all the answers

    How is a blastula different from a morula in terms of structure?

    <p>A blastula has a hollow center filled with fluid, while a morula is a solid ball of cells.</p> Signup and view all the answers

    Which statement accurately describes the process during the morula stage?

    <p>Division process continues forming a solid ball of cells.</p> Signup and view all the answers

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