Chapter 10: Cell Growth

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• Chapter 10 Cell Growth Division
• Essential Questions
• What problems does growth cause for cells?
• What are the main events of the cell cycle?
• What are the four phases of mitosis?

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Section Outline
Section 10-1

• 101 Cell Growth
• A. Limits to Cell Growth
• DNA Overload
• -demand for DNA instructions can become too
  heavy if cell too big
• Exchanging Material
• -all materials must pass through cell membrane
• Ratio of Surface Area to Volume
• -volume of cell that needs materials increases
  faster than surface area of membrane through
  which material must move
• Cell Division
• -solves the problem of cell being too big

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Ratio of Surface Area to Volume in Cells
Section 10-1
Cell Size
Surface Area (length x width x 6)
Volume (length x width x height)
Ratio of Surface Area to Volume
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Section Outline

• 102 Cell Division
• Chromosomes made of DNA and protein
• 1. Humans 46 chromosomes
• 2. chromatids 2 sister chromosomes that are
  duplicates
• The Cell Cycle
• Cell grows, preps. for division, the divides to
  form 2 daughter cells
• C. Events of the Cell Cycle see diagram
• D. Mitosis
• 1. Prophase chromosomes become visible,
  centrioles separate, take up positions of opp.
  sides of nucleus, spindle forms, nuclear envelope
  breaks up
• 2. Metaphase chromos. line up across center of
  cell, attached to spindle
• 3. Anaphase chromatids separate to become
  indiv. chromos., form 2 groups near opposite ends
  of spindle
• 4. Telophase 2 new nuclei begin to form around
  ea. cluster of chromos.
• E. Cytokinesis cytoplasm divides. Plants cell
  plate Animals membrane pinches

Section 10-2
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Figure 104 The Cell Cycle
Section 10-2
G1 phase
M phase
S phase
G2 phase
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Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
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Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
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Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
Go to Section
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Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
Go to Section
10
Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
Go to Section
11
Figure 105 Mitosis and Cytokinesis
Section 10-2
Spindle forming
Centrioles
Centromere
Chromatin
Centriole
Nuclear envelope
Chromosomes (paired chromatids)
Interphase
Prophase
Spindle
Cytokinesis
Centriole
Metaphase
Individual chromosomes
Telophase
Anaphase
Nuclear envelope reforming
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