Embryology Embryogenesis and Blastogenesis

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Questions and Answers

What term is used for the development of new individuals by means of asexual reproduction?

  • Cleavage
  • Organogenesis
  • Blastogenesis (correct)
  • Gametogenesis

Which phase of ontogenic development involves the formation of body structures and organs?

  • Gametogenesis
  • Cleavage
  • Organogenesis (correct)
  • Gastrulation

What marks the end of the embryonic period in ontogenic development?

  • Organ formation (correct)
  • Fertilization
  • Gastrulation
  • Cleavage

Which term refers to the development and maturation of sex cells called gametes?

<p>Spermatogenesis (C)</p> Signup and view all the answers

During which period do organs grow and begin to function in ontogenic development?

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

What is defined as the time from fertilization to the earliest stages of organ development?

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

What is the main difference between centrolecithal and telolecithal ova?

<p>The distribution of yolk in the egg (A)</p> Signup and view all the answers

What is the morphology of a morula?

<p>Solid ball of blastomeres (D)</p> Signup and view all the answers

In mammalian blastocysts, what are the two populations of cells present?

<p>Inner cell mass and trophoblast (B)</p> Signup and view all the answers

What is the composition of the avian blastoderm in terms of areas?

<p>Area pellucida and area opaca (D)</p> Signup and view all the answers

During blastogenesis, what morphogenic process gives rise to the three germ layers?

<p>Gastrula (A)</p> Signup and view all the answers

Which cells give rise to the body of the embryo, yolk sac, and allantois in blastogenesis?

<p>Inner cell mass (D)</p> Signup and view all the answers

What is the role of the notochord in the embryonic development process?

<p>Induces formation of the head process (B)</p> Signup and view all the answers

Which structure marks the location of the future vertebral column and base of the cranium?

<p>Notochord (C)</p> Signup and view all the answers

What is the adult fate of the notochord in embryonic development?

<p>Nucleus pulposus of intervertebral discs (B)</p> Signup and view all the answers

Which layer of cells in blastogenesis later forms the yolk sac?

<p>Hypoblast (D)</p> Signup and view all the answers

What induces overlaying ectoderm to become neuroectoderm to form the neural plate?

<p>Notochord (A)</p> Signup and view all the answers

Which structure undergoes cavitation to give rise to body cavities in blastogenesis?

<p>Somatic mesoderm (B)</p> Signup and view all the answers

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