33.txt

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Anonymous
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222775
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33.txt
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2013-06-07 02:19:56
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33 principles life
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ch 33 principles of life
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  1. Succession of morphological changes during normal development
    Ontogeny
  2. What a cell becomes dependent on the distribution of materials around it
    Cytoplasmic determinants
  3. A cell can become any of the cell types that will be present
    Totipotent
  4. Development of specialized cells
    Cell differentiation
  5. The sperm has very little
    Cytoplasm
  6. The sperm contributes to the
    Centriole
  7. Egg is filled with
    Cytoplasm, nutrients, organelles, and mRNA.
  8. Band of pigment OPPOSITE site of sperm entry in amphibians
    Grey crescent
  9. ___ is a transcription factor required for germ layer development.
    Beta catenin
  10. Beta catenin is expressed only on the _____ side of embryo
    Dorsal
  11. Sperm's centrioles initiates cytoplasmic reorganization and organizes ____ in cytoplasm
    Microtubules
  12. Early rapid cell division stages (cleavage)
    Fertilization > morula > blastula. Cells divide to smaller blastomeres where they'll receive different cytoplasmic determinants on how they will develop.
  13. In eggs, the _____ is where the yolk is concentrated
    Vegetal pole
  14. Cleavage planes are established by the ____ and the distribution of yolk/cytoplasm
    Polarity
  15. This kind of cleavage has very little yolk and cleavage furrow passes al through cells
    Holobolastic (complete)
  16. 2 parts of blastocyst
    Trophoblast and inner cell mass
  17. The inner cell mass will become the
    Embryo
  18. The trophoblast that surrounds the embryo will become
    The placenta
  19. This kind of cleavage has lots of yolk. Division is restricted to small region
    Discoidal
  20. During _____ cleavage, furrows do not extend to yolk
    Discoidal
  21. A type of cleavage in insects
    Superficial
  22. During ______ cleavage, cells do mitosis but not cytokinesis, so you get one cell and many nuclei
    Superficial
  23. What happens during superficial cleavage
    Nuclei migrate to outer part of cell, plasma membrane moves in and separates nuclei into separate cells SURROUNDING central yolk.
  24. In early development, a cell is totipotent, meaning
    It can become anything
  25. Each blastomere has a job, removing a blastomere results in missing pat of embryo. This kind of development is called
    Mosaic
  26. This kind of development can move some cells during cleavage and remaining cells will cmpensate
    Regulative
  27. FORMATION steps of germ layers in gastrulation
    Fertilization > morula> blastula > blastocyst > gastrula > organogenisis
  28. This stage is characterized by changes in cell motility, cell shape and adhesion
    Gastrulation
  29. During this stage, cells move from surface to interior resulting in 3 layers. What is the stage and what are the layers?
    Gastrulation; endoderm, mesoderm, ectoderm.
  30. The anterior end of the neural tube becomes
    Forebrain, midbrain, and hindbrain
  31. Hind brain + midbrain =
    Brain stem (heart and breathing)
  32. Hindbrain becomes
    Cerebellum; motor control
  33. Forebrain becomes
    Cerebral hemesphere
  34. Relay station for incomming sensory info
    Thalamus
  35. Receives info for regulating internal environment
    Hypothal
  36. ___ produce vertebrae, intervertebral disks, and muscles
    Somites
  37. Amniotes have ____ extraembryonic membranes
    4
  38. The ectoderm and mesoderm that surrounds the embryo and holds fluid
    Amnion
  39. The ectoderm plus mesoderm. Surrounds embryo and other membranes, gas xchange
    Chorion
  40. Extention of hypoblast layer; surrounds yolk and nourishes growing embryo
    Yolk sac
  41. Forms as outgrowth of extra embryonic endoderm and mesoderm. Collects excretory products, contributes to gas xchange
    Allantois
  42. Trophoblast cells (chorion) + maternal tissue =
    Placenta
  43. Urinary bladder also contributes to umbilical cord
    Allantois in mammals

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