A&P Exam 2

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Author:
ChapinJeanie
ID:
173367
Filename:
A&P Exam 2
Updated:
2012-09-25 17:55:01
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cells growth reproduction
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V. Cell growth and reproduction
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  1. The cell life cycle
    • 2 main phases interphase and cell division
    • 23 pairs of chromosomes
    • 1 from ma and 1 from pa
    • 23 single and 23 single = 23 pairs
    • has to be exact ex. 3 copies of chrom 1 = down syndrome
  2. The cell life style

    Interphase 
    • The time from cell formation to cell division
    • G1- growth, does what it does for a living
    • S-sythesis, DNA sythnesis
    • G2- Growth and final preporation for cell division
  3. interphase



    DNA Synthesis
    • replication during S phase
    • 1. DNA uncoils
    • 2. Enzyme breaks H bonds between DNA strands
    • 3. DNA polymerase builds the new DNA strands
    • 4. Diagram of DNA synthesis? online?
  4. Cell division
    • Divided into mitosis and cytokinesis
    • essential for body growth and repair
  5. Mitosis


    Prophase
    • setting the sage
    • nuclear envelope disinergrates
    • chromotin condenses¬†
    • chromosomes form
    • mitotic spindle forms
    • microtubles extend from centromer
  6. Mitosis


    Metaphase
    Chromosomes line up at the equator
  7. Mitosis


    Anaphase
    • Chromosomes move down towards opposite ends
    • moving in unison, in a row
  8. Mitosis


    Telophase
    • Prophase in reverse
    • rebuild nuclear envelope and uncoil chromosomes
  9. Cytokinesis
    • Division of cytoplasm
    • was one cell, mow two

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