Fertilization Process: From Sperm to Zygote
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Questions and Answers

What is the primary mechanism by which oxygen and carbon dioxide cross the placenta?

  • Facilitated diffusion
  • Active transport
  • Simple diffusion (correct)
  • Osmosis

    • During which weeks does the placenta take over the endocrine function from the corpus luteum?

  • Weeks 12-17 (correct)
  • Weeks 6-10
  • Weeks 18-22
  • Weeks 24-28

    • What is the function of relaxin during fetal development?

  • Loosens the pelvis and dilates the cervix (correct)
  • Stimulates fetal growth and development
  • Stimulates the production of thyroid hormone
  • Inhibits uterine contractions

    • What is the primary function of progesterone during fetal development?

    <p>Inhibits uterine contractions</p> Signup and view all the answers

    When does the production of surfactant by the lungs begin?

    <p>Weeks 16-20</p> Signup and view all the answers

    What is the primary function of hCG during fetal development?

    <p>Stimulates male gonads to produce testosterone</p> Signup and view all the answers

    What is the term for the process by which a sperm fuses with an oocyte to form a zygote?

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

    What is the function of the corona radiata and zona pellucida?

    <p>To facilitate sperm penetration</p> Signup and view all the answers

    What is the term for the release of enzymes by the sperm to penetrate the corona radiata and zona pellucida?

    <p>Acrosomal reaction</p> Signup and view all the answers

    What percentage of blastocysts fail to implant in the uterus?

    <p>50%-75%</p> Signup and view all the answers

    What is the function of human chorionic gonadotropin (hCG)?

    <p>To maintain the corpus luteum</p> Signup and view all the answers

    What is the term for the outer layer of cells that surrounds the embryo?

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

    What is the purpose of the yolk sac?

    <p>To produce blood cells and germ cells</p> Signup and view all the answers

    What is the term for the process by which the embryo develops into a three-layered disc?

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

    What is the term for the indentation that forms in the primitive streak?

    <p>Neural groove</p> Signup and view all the answers

    What is the function of the placenta?

    <p>To provide oxygen and nutrients to the embryo</p> Signup and view all the answers

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