Embryology_Introduction
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Questions and Answers

During which period of human development do organs grow and mature?

  • Pre-clerkship period
  • Fetal period (correct)
  • Adolescent period
  • Embryonic period
  • When does the embryonic period of development end?

  • At 8 weeks (correct)
  • At the onset of the last normal menstrual period
  • At 3 weeks
  • At birth
  • What is the critical time frame for the occurrence of malformations during human development?

  • First trimester (correct)
  • Second trimester
  • Postnatal period
  • Third trimester
  • When does implantation typically occur after fertilization?

    <p>6-7 days after fertilization</p> Signup and view all the answers

    Which of the following is NOT a classification of birth defects?

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

    During which time period is the embryo most susceptible to teratogens?

    <p>First trimester</p> Signup and view all the answers

    What is the difference between malformation, disruption, deformation, and dysplasia?

    <p>Malformation refers to abnormal tissue development, disruption refers to the breakdown of normal tissue, deformation refers to abnormal shaping or positioning of a body part, and dysplasia refers to abnormal cell growth.</p> Signup and view all the answers

    Which of the following terms is used to describe a morphological defect resulting from extrinsic causes such as drugs, chemicals, or viruses?

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

    Which of the following statements is true about malformations and defects?

    <p>All malformations are defects, but not all defects are malformations.</p> Signup and view all the answers

    What is the term used to describe an abnormal form, shape, or position resulting from mechanical forces?

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

    Which of the following is a pattern of defects derived from a disturbance of a single developmental field?

    <p>Polytopic field defect</p> Signup and view all the answers

    During which time frame is the embryo most susceptible to teratogens?

    <p>Weeks 3-8</p> Signup and view all the answers

    Which of the following is NOT a germ layer in the mammalian embryo?

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

    What is the purpose of the figures in the textbook?

    <p>To guide studying the relationships between events during development</p> Signup and view all the answers

    Which time period is characterized by the specification of groups of cells into tissues?

    <p>Weeks 3-8</p> Signup and view all the answers

    Which one of these is NOT a classification of developmental disturbances resulting in birth defects?

    <p>Hypoplasia or hyperplasia</p> Signup and view all the answers

    What is the term used to describe a pattern of defects derived from a single structural defect or mechanical factor?

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

    Which birth defect is characterized by an abnormally small jaw causing the infant's tongue to fall toward the back of the mouth, blocking the airway?

    <p>Pierre-Robin Sequence</p> Signup and view all the answers

    What is the term used to describe a nonrandom occurrence in two or more individuals of multiple anomalies not known to be a polytopic field defect, sequence, or syndrome?

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

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