Objectives February 1

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Objectives February 1

• Explain why cells are relatively small
• Summarize the primary stages of the cell cycle.
• Describe the stages of interphase.

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Size Matters
Size Matters!
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What limits cell size

• Ratio of surface area to volume. The bigger the
  ratio the better as a cell gets bigger the ratio
  shrinks.
• Think Stadium gates!

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Start with 1.00
Surface Area (squared)
1.00
2.00
4.00
8.00
16.00
32.00
64.00
128.00
256.00
Volume (Cubed)
1.00
3.00
9.00
27.00
81.00
243.00
729.00
2,187.00
6,561.00
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512.00
1,024.00
2,048.00
4,096.00
8,192.00
16,384.00
32,768.00
65,536.00
131,072.00
262,144.00
524,288.00
19,683.00
59,049.00
177,147.00
531,441.00
1,594,323.00
4,782,969.00
14,348,907.00
43,046,721.00
129,140,163.00
387,420,489.00
1,162,261,467.00
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The ability to transport substances limits cell
size

• Diffusion
• Transport Proteins

Cellular Communications The ability for
signaling proteins to move throughout the cell
limits cell size
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Surface to Volume Ratio limits cell size
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The Cell Cycle
The Cell Cycle
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The Cell Cycle
The Cell Cycle
Interphase Mitosis Cytokinesis
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The Cell Cycle
The Cell Cycle
Interphase
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The Cell Cycle
Grows and Develops. Prepares to duplicate DNA.
Interphase
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The Cell Cycle
Grows and Develops. Prepares to duplicate DNA.
Interphase
Cell Copies its DNA
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The Cell Cycle
Grows and Develops. Prepares to duplicate DNA.
Interphase
Cell Copies its DNA
Cell prepares its nuclear material for division.
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The Cell Cycle
Mitosis
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The Cell Cycle
Cytokinesis
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Warm up

• List three factors that limit cell size.

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Objectives February 3rd

• Review 3 factors that limit cell size
• Summarize the primary stages of the cell cycle.
• Describe the stages of interphase.

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Factors Limiting Cell Size
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Factors Limiting Cell Size

• Surface to volume ratio

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Factors Limiting Cell Size

• Surface to volume ratio
• The ability to transport substances (diffusion,
  transport proteins, cytoskeleton railway)

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Factors Limiting Cell Size

• Surface to volume ratio
• The ability to transport substances (diffusion,
  transport proteins, cytoskeleton railway)
• Cellular communications

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The Cell Cycle
The Cell Cycle
Interphase Mitosis Cytokinesis
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Mitosis
http//www.youtube.com/watch?vVlN7K1-9QB0
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The Cell Cycle
The Cell Cycle
Interphase Mitosis Cytokinesis
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Stages of Interphase

• G1, S, G2

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The Cell Cycle
Grows and Develops. Prepares to duplicate DNA.
Interphase
Cell Copies its DNA
Cell prepares its nuclear material for division.
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Summary

• 3 factors limit cell size
• When cells reach these limits the divide
• The Cell Cycle is the process of cellular
  reproduction
• Three primary stages of the cell cycle are
  Interphase, Mitosis and cytokinesis
• The cell spends the vast majority of its life in
  interphase.

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Homework

• Page 261 1 through 13 inclusive. Write out the
  questions and the answers.
• Quiz tomorrow on section 9.1
• SQ3R section 9.2 (pgs. 248-252)

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Objectives Section 9.2

• Eukaryotic Cells reproduce by mitosis, the
  process of nuclear division, and cytokinesis, the
  process of cytoplasm division.
• Describe the events of each stage of mitosis
• Explain the process of cytokinesis

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1
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1
2
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3
1
2
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3
1
2
4
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Homework

• Page 261 1 through 13 inclusive. Write out the
  questions and the answers.
• Quiz tomorrow on section 9.1
• SQ3R section 9.2 (pgs. 248-252)

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Objectives February 6

• Review mitosis is the process by which duplicated
  DNA is divided
• The four stages of mitosis are Prophase,
  Metaphase, Anaphase, Telophase
• Cytokinesis is the process of cytoplasm division
  that results in genetically identical daughter
  cells.

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Interphase

• Duplicates DNA in preparation for Mitosis

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Mitosis

• The key activity of mitosis is the accurate
  separation of the cells replicated DNA

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Cytokinesis

• The process of cytoplasm division that results in
  genetically identical daughter cells.

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Prophase
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Metaphase
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Anaphase
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Telophase
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Telophase
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Interphase

• Duplicates DNA in preparation for Mitosis

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Mitosis

• The key activity of mitosis is the accurate
  separation of the cells replicated DNA

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Cytokinesis

• The process of cytoplasm division that results in
  genetically identical daughter cells.

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Objectives February 6

• Review mitosis is the process by which duplicated
  DNA is divided
• The four stages of mitosis are Prophase,
  Metaphase, Anaphase, Telophase
• Cytokinesis is the process of cytoplasm division
  that results in genetically identical daughter
  cells.

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Homework

• SQ3R section 9.3
• Quiz Monday you will be able to use the SQ3R.