BYU11102: Development and Physiology - Part 1 (Lectures 2-6)
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BYU11102: Development and Physiology - Part 1 (Lectures 2-6)

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Questions and Answers

What is the term used to describe the process where cells on the surface move to completely cover the embryo?

  • Wedging
  • Extension
  • Invagination (correct)
  • Convergence

    • Which structure in the figure represents the future mesoderm?

  • Dorsal lip of blastopore
  • Ectoderm
  • Archenteron (correct)
  • Endoderm

    • What is the result of cells meeting and converging inside the embryo?

  • Endoderm involution
  • Mesoderm formation
  • Dorsal lip formation
  • Convergent extension (correct)

    • Which cytoskeletal component directs the process of elongation in cell movement?

    <p>Actin filaments</p> Signup and view all the answers

    What happens to the blastocoel during the process of cell movement inside the embryo?

    <p>It shrinks</p> Signup and view all the answers

    In which direction do cells elongate and crawl during the process of convergent extension?

    <p>Parallel to each other</p> Signup and view all the answers

    What is the term for the process when cells elongate and crawl between each other?

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

    Which process leads to elongation (extension) in building a new organism?

    <p>Convergent extension</p> Signup and view all the answers

    During what cellular process does the embryo change shape by elongating?

    <p>'Extension'</p> Signup and view all the answers

    What is the term for the process of converting a fertilised egg into a ball or disc of cells?

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

    Which phase of the cell cycle involves DNA synthesis?

    <p>S phase</p> Signup and view all the answers

    What is the result of the first 5-7 divisions of a sea urchin embryo?

    <p>Hollow ball of cells</p> Signup and view all the answers

    Which process involves little to no protein synthesis and no growth of the embryo?

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

    In which type of cleavage, there is virtually no growth of the embryo?

    <p>Holoblastic cleavage</p> Signup and view all the answers

    What structure surrounds a fluid-filled cavity called blastocoel in a blastula?

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

    Which process involves formation of organ rudiments from the three germ layers?

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

    What leads to egg activation and an increase in cellular respiration and protein synthesis?

    <p>$Ca^{2+}$ release</p> Signup and view all the answers

    Which phase of the cell cycle involves mitosis?

    <p>$M$ phase</p> Signup and view all the answers

    'Does the egg contain yolk proteins for embryo nourishment?' refers to differences in:

    <p>$Early$ development among animals</p> Signup and view all the answers

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