Fertilization Process
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Fertilization Process

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Questions and Answers

What type of transport is required for amino acids and iron to cross the placenta?

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

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

  • Weeks 10-14
  • Weeks 20-24
  • Weeks 12-17 (correct)
  • Weeks 15-20

    • What is the function of relaxin during pregnancy?

  • To loosen the pelvis and dilate the cervix (correct)
  • To stimulate maternal tissue growth
  • To inhibit contractions
  • To stimulate fetal development

    • What is the name of the plug of mucus that is expelled from the cervix about 2 days before labor?

    <p>Bloody show</p> Signup and view all the answers

    What is the primary function of estrogen during pregnancy?

    <p>To stop ovulation and stimulate maternal tissue growth</p> Signup and view all the answers

    What is the name of the stage of childbirth where the fetus is expelled from the birth canal?

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

    What is the primary function of the foramen ovale and ductus arterioles in a newborn?

    <p>To direct blood flow from the right atrium to the left atrium</p> Signup and view all the answers

    What is the significance of colostrum in lactation?

    <p>It is rich in immunoglobulins and provides passive immunity</p> Signup and view all the answers

    What is the term for an individual who carries a recessive allele and can pass it on to their offspring?

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

    What is the process by which the uterus returns to its pre-pregnancy size after birth?

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

    What triggers the production of breast milk in lactation?

    <p>Infant sucking at the nipple</p> Signup and view all the answers

    What determines an individual's sex?

    <p>Sex chromosomes (XX or XY)</p> Signup and view all the answers

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

    <p>To prevent the sperm from penetrating the oocyte</p> Signup and view all the answers

    What is the fate of the sperm that do not penetrate the corona radiata and zona pellucida?

    <p>They are destroyed by phagocytic leukocytes</p> Signup and view all the answers

    What is the term for the process by which the sperm releases enzymes to penetrate the corona radiata and zona pellucida?

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

    What is the approximate percentage of blastocysts that fail to implant in the uterine wall?

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

    What is the term for the fluid-filled sac that surrounds the embryo and provides protection?

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

    What is the purpose of the primitive streak in embryogenesis?

    <p>To differentiate the embryo into endoderm, mesoderm, and ectoderm</p> Signup and view all the answers

    What is the term for the development of the placenta from embryonic and maternal tissues?

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

    What is the approximate time period during which the placenta develops?

    <p>Weeks 4-12</p> Signup and view all the answers

    What is the term for the process by which the embryo becomes cylindrical in shape due to embryonic folding?

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

    What is the term for the formation of identical twins, resulting from the splitting of a single zygote?

    <p>Identical twins</p> Signup and view all the answers

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