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Chapter 10 Cell Growth _ Division Notes

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					          Chapter 10 Cell Growth & Division Notes


10-1 Cell Growth

  I.   Increase in cell size increases the demands to move:
       a. nutrients
       b. wastes
  II. Surface Area
       a. Equation- length X width X number of sides


       b. Influences the movement of:
            i. cell
  III. Volume
       a. Equation- length X width X height


       b. Influences the rate that:
            i. oxygen
            ii. nutrients
  IV. Determining Ratio of Surface Area to Volume
       a. Equation : divide SA by Volume
       b. As a cell grows, the volume increases faster than the
          surface area.
        c. Before a cell becomes too large it will go through a
             process called cell division.


10-2 Cell Division

CONCEPT MAP 10-2


  I.    Prokaryotes divide by:

        a.



  II.   Eukaryotes 2 Stage Division

        a. Divide nucleus; ____________

        b. Divide the cytoplasm; _______________

        c. before cell division; genetic information is

             __________________

                i. chromosomes are copied (replicated) making two

                  identical _______ ______________

               ii. these chromatids are attached at a

                  ___________________
  III. Eukaryotic Cell Cycle – series of events cells go through

       before division

       a. During the cell cycle a cell performs the following

          tasks:

             i. Cell grows

            ii. Prepares for division

            iii. Divides to form two daughter cells

       b. Four Phases of the cell cycle

             i. M phase – includes both: mitosis & cytokinesis

          INTERPHASE
            ii. G1

                     1. cell increases in size

                     2. makes new proteins & organelles

            iii. S

                     1. copy chromosomes

            iv. G2

                     1. organelles & molecules needed for cell

                       division are made

QUIZ on cell cycle
Mitosis – 4 Phases
  I.    Prophase – first and longest phase

        a.

        b.

        c. Centrioles are located in a region called the

             _____________ that organizes the _____________

             that separates the _______________

  II.   Metaphase

        a.

        b.

  III. Anaphase

        a.

        b.

        c.

  IV. Telophase

        a.

  V.    Cytokinesis – division of the: _____________

        a. In animal cells:



        b. In plant cells:



Analyzing Data pg. 249;       Bio #1–4   &   Gen Bio #1-2
10-3 Regulating the cell cycle

CONCEPT MAP 10-3
    I.   CYCLINS – group of ____________ that regulate the

         cell cycle in _____________ cells

         a. Internal Regulators

               i. Proteins that:



              ii. Allow the cell processes to proceed only after :



         b. External Regulators

               i. Proteins that :



              ii. Growth factor examples

                    1.

                    2.

BONUS Opportunity – 5 pts. 3rd marking period
     Designing an anti cancer drug – Bio 1 pg. 252
          Show how they interrupt the cell cycle

          Prevent cell division

     Stem Cells: promises and problems pg. 253 – GEN BIO
          3 paragraphs- Intro, Body, Conclusion
II.   Uncontrolled Cell Growth (cancer)

      a. Cells lose the ability to control _________ ______

      b. Divide uncontrollably to form _______

      c. Cancer cells can break free from _________ and

        circulate through out the body; called ___________

      d. Cancer cells harm by:

            i.

           ii.

          iii.

      e. p53 Gene

           i. normal function is to:

          ii. defective p53 gene causes

				
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