ANS 123 Lec

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Anonymous
ID:
269679
Filename:
ANS 123 Lec
Updated:
2014-04-07 21:38:58
Tags:
growth development
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Description:
definitions and main points of lectures.
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  1. What do we need for development to happen???
    • -changes in physiological needs as animals mature.    
    • -physical consequence of growing bigger--> "pure physics: (eye can only be so big).
  2. Accretion
    deposit of material between cells
  3. Hyperplasia
    increase in cell #
  4. hypertrophy
    increase in cell size
  5. Development
    from a lower to higher form of complexity
  6. Growth
    increase in size (height, wt, body ash, body protein, lean tissue wt)
  7. SUMMARY (Lecture 1)
    • a growing living thing has to alter its form and function.
    • Growth cannot happen without development.
    • development continues throughout life until death.
  8. Prenatal Development (importance)
    • time
    • future
    • performance
    • future health
    • little flexibility
    • important for the later health of animal
  9. Prenatal Development continued
    • 3 parts
    • Preimplantation phase-from fertilization to implantation/attachment
    • Embryonic phase-where all major organ systems are established
    • Fetal phase-growth and refinement of organ systems
  10. Influence of PRENATAL DEV. post-natally
    • baby survival is proportional to birth weight
    • depending on what happened during prenatal life
    • -->it affects the kind of disease you get as an adult. (ex: heart disease, diabetes)
  11. Development
    • it's similar to other species
    • it's irreversible
    • increasing complexity
  12. embryo
    from conception until development of organs
  13. fetus
    from then until birth
  14. neonate
    newborn
  15. SUMMARY (Lecture 2)
    • Prenatal development is an important period of an organism life (time, future performance, future health, little flexibility)
    • Development is progressive, continuous and results in increasing complexity
    • Similar between species
    • All cells have the necessary information to direct the formation of a whole individual (nuclear totipotency)
  16. Epigenetics
    • changes that are inheritable from cell to cell.
    • can last for multiple generations
    • changes remain through cell division

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