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Chapter 10. Cell Growth And Division. I. Cell Growth. DNA. A. Limits to Cell Growth 2 reasons cells divide rather than continuing to grow indefinitely : 1) larger a cell grows,the more demands on its _______

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Chapter 10

Chapter 10

Cell Growth And Division


I cell growth
I. Cell Growth

DNA

  • A. Limits to Cell Growth

  • 2 reasons cells divide rather than continuing to grow indefinitely:

    • 1) larger a cell grows,the more demands on its _______

      • will not be making enough copies of DNA as size increases---This would cause an information crisis.

    • 2) difficult to move waste and nutrients across cell

      • rate @ which waste products leave cell depends on _______________________ of cell=total area of cell membrane

Surface area


Cell volume


Ratio of surface area to volume in cells
Ratio of Surface Area to Volume in Cells depends on _____________________

Section 10-1

Cell Size

Surface Area (length x width x 6)

Volume

(length x width x height)

Ratio of Surface Area to Volume


decrease


B division of cell
B. Division of Cell __________________..causing serious problems for cell

-A cell divides into 2 daughter cells =_______________________________

  • This happens before a cell can get too large

  • DNA ___________________before cell division,solving info crisis.

Cell division

replicates


Ii cell division
II. Cell Division __________________..causing serious problems for cell

  • ***simpler in prokaryotes

    • A. chromosomes –carries genetic info in eukaryotes

      • made up of ____________ and proteins

      • cells of every organism have a specific # of Chromosomes

      • humans have___ Chromosomes

      • fruit flies have 8

      • usually not visible except in cell division,when they condense

      • ___________________before cell division

46

Replicates or copies

DNA


chromatids

centromere


B cell cycle
B. Cell Cycle __________________,which separate from each other in cell division

  • ________________________is in- between phase

  • ______________________is the series of events that a cell goes through during growth and division….Where the cell grows,prepare for division,divides into 2 daughter cells

interphase

Cell Cycle


  • 4 phases __________________,which separate from each other in cell division

  • M= _______________________________

  • S= ________________________________

  • G1 and G2= ________________________________________________________

  • Mitosis and cytokinesis

    Chromsomes replicate & DNA synthesis,some proteins synthesize

    G1=cell growth/G2= organelles and molecules produced


    Figure 10 4 the cell cycle
    Figure 10–4 The Cell Cycle __________________,which separate from each other in cell division

    Section 10-2

    G1 phase

    M phase

    S phase

    G2 phase


    ANAPHASE __________________,which separate from each other in cell division


    1 prophase
    1) Prophase __________________,which separate from each other in cell division

    centrioles

    • Longest phase

    • Chromosomes become visible

    • _______________________,2 tiny structures near nuclear envelope-separate and take positions on opposite ends of nucleus

    • Centrosome region helps organize __________________-microtubules that help separate chromosomes

    • Chromosomes attach to __________________________

    • @ end chromosomes coil tightly and nuclear envelope disappears

    Spindle fibers

    spindle


    • 2 __________________,which separate from each other in cell division) Metaphase-

      • chromosomes line up @ center

      • Centromeres go to 2 poles

  • 3) Anaphase-

    • Centromeres split

    • Chromatids separate and become individual _____________________

  • New chromosomes go to opposite poles and then stop moving

  • chromosomes


    • 4) Telophase- __________________,which separate from each other in cell division

    • Chromosomes disperse into tangle of material

    • New nuclear envelopes

    • Spindle breaks apart

    • Nucleolus becomes visible


    D. Cytokinesis-divison of cytoplasm __________________,which separate from each other in cell division

    • Usually along w/ Telophase

    • Cell plate forms in plants that becomes the ______________________________

    CELL WALL


    III. __________________,which separate from each other in cell division

    • _____________________= disorder in which some of the body’s cells lose the ability to regulate growth

    • They do not respond to signals that regulate growth

    • Divide uncontrollably,making ___________________(masses of cells)

    • _____________=protein that regulates normal cell cycle (in eukaryotes)

    tumors

    cancer

    cyclins


    Video contents

    Videos __________________,which separate from each other in cell division

    Video Contents

    • Click a hyperlink to choose a video.

    • Animal Cell Mitosis

    • Animal Cell Cytokinesis


    Video 1

    Video 1 __________________,which separate from each other in cell division

    Video 1

    • Click the image to play the video segment.

    Animal Cell Mitosis


    Video 2

    Video 2 __________________,which separate from each other in cell division

    Video 2

    Animal Cell Cytokinesis

    • Click the image to play the video segment.


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