Fetal Development Periods Quiz
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Questions and Answers

During which period of fetal development does the organogenesis occur?

  • Embryonic period (correct)
  • Second week of life
  • Pre-embryonic period
  • Fetal period
  • At what stage does the mesoderm form according to the text?

  • Second week of life
  • Fourth week of life
  • Third week of life (correct)
  • First week of life
  • What is the approximate weight and height of the fetus during the first month after conception?

  • 600mg and 2 cm
  • 800mg and 4 cm
  • 400mg and 1 cm (correct)
  • 200mg and 3 cm
  • Which layer is the outer layer formed within the first 3 weeks of fetal life?

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

    At approximately how many days after conception does the outer part of the zygote attach to the uterine wall and the placenta begins to develop?

    <p>~10 days</p> Signup and view all the answers

    What is the proportion of the head to the entire body during the first month after conception, according to the text?

    <p>1/3</p> Signup and view all the answers

    During which period is the brain most vulnerable to teratogens?

    <p>Embryonic period: 15 - 25 days after conception</p> Signup and view all the answers

    What causes the foramen ovale to close within hours after birth?

    <p>Increased pulmonary blood flow</p> Signup and view all the answers

    When should the ductus arteriosus structurally close after birth?

    <p>Within 24 hours</p> Signup and view all the answers

    What causes the ductus venosus to immediately close when the umbilical cord is clamped?

    <p>Increase in systemic vascular resistance</p> Signup and view all the answers

    During which period do newborns seem to move through periods of irregular adjustment in the first 6 hours of life?

    <p>Periods of Reactivity</p> Signup and view all the answers

    What is assessed during the first 2 hours sensitive period of extrauterine life?

    <p>(Color, temperature, heart rate, respiration, activity, ability to respond to stimulation)</p> Signup and view all the answers

    What is the purpose of Apgar Scoring?

    <p>To assess extrauterine adaptation and rule out abnormalities</p> Signup and view all the answers

    What are the characteristics of the embryonic period in terms of vulnerability to teratogens?

    <p>$15 - 25$ days after conception: brain is most vulnerable.</p> Signup and view all the answers

    Which factor influences the likelihood of anatomical defects due to teratogen exposure during the fetal period?

    <p>Intensity &amp; duration of exposure</p> Signup and view all the answers

    What causes the legs to be most vulnerable $24-36$ days after conception?

    <p>$24 - 36$ days after conception: legs are most vulnerable.</p> Signup and view all the answers

    During which period is the fetal brain most susceptible to teratogens?

    <p>Embryonic period</p> Signup and view all the answers

    At approximately how many days after conception does the foramen ovale close?

    <p>Immediately after birth</p> Signup and view all the answers

    What causes the legs to be most susceptible to damage during days $24-36$ after conception?

    <p>Rapid cell differentiation</p> Signup and view all the answers

    What is the proportion of the head to the entire body during the first month after conception?

    <p>1:3</p> Signup and view all the answers

    What causes the ductus venosus to close immediately when the umbilical cord is clamped?

    <p>Postnatal adaptation</p> Signup and view all the answers

    During which period is exposure to teratogens more likely to stunt growth rather than cause anatomical defects?

    <p>Fetal period</p> Signup and view all the answers

    What is the approximate timeframe during which the heart is most vulnerable to teratogens after conception?

    <p>20-40 days</p> Signup and view all the answers

    Which factor causes the ductus arteriosus to structurally close within 24 hours after birth?

    <p>Increased pulmonary blood flow</p> Signup and view all the answers

    What causes the foramen ovale to close within hours after birth?

    <p>Higher concentrations of oxygen</p> Signup and view all the answers

    At approximately how many days after conception does the placenta begin to develop and attach to the uterine wall?

    <p>30-40 days</p> Signup and view all the answers

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