objectives february 1 explain why cells are relatively small summarize the primary stages of the...
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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.
Size MattersSize Matters!
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!
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
$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
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
Surface to Volume Ratio limits cell size
The Cell Cycle
The Cell Cycle
The Cell Cycle
The Cell Cycle
Interphase
Mitosis
Cytokinesis
The Cell Cycle
The Cell Cycle
Interphase
The Cell Cycle
Interphase
Grows and Develops. Prepares to duplicate DNA.
The Cell Cycle
Interphase
Grows and Develops. Prepares to duplicate DNA.
Cell Copies its DNA
The Cell Cycle
Interphase
Grows and Develops. Prepares to duplicate DNA.
Cell Copies its DNA
Cell prepares its nuclear material for division.
The Cell Cycle
Mitosis
The Cell Cycle
Cytokinesis
Warm up
List three factors that limit cell size.
Objectives: February 3rd
Review 3 factors that limit cell size
Summarize the primary stages of the cell cycle.
Describe the stages of interphase.
Factors Limiting Cell Size
Factors Limiting Cell Size
• Surface to volume ratio
Factors Limiting Cell Size
• Surface to volume ratio
• The ability to transport substances (diffusion, transport proteins, cytoskeleton railway)
Factors Limiting Cell Size
• Surface to volume ratio
• The ability to transport substances (diffusion, transport proteins, cytoskeleton railway)
• Cellular communications
The Cell Cycle
The Cell Cycle
Interphase Mitosis Cytokinesis
http://www.youtube.com/watch?v=VlN7K1-9QB0
Mitosis
The Cell Cycle
The Cell Cycle
Interphase Mitosis Cytokinesis
Stages of Interphase
• G1, S, G2
The Cell Cycle
Interphase
Grows and Develops. Prepares to duplicate DNA.
Cell Copies its DNA
Cell prepares its nuclear material for division.
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.
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)
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
1
1
2
1
2
3
1
2
3
4
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)
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.
Interphase
Duplicates DNA in preparation for Mitosis
Mitosis
The key activity of mitosis is the accurate separation of the cells replicated DNA
Cytokinesis
The process of cytoplasm division that results in genetically identical daughter cells.
Prophase
Metaphase
Anaphase
Telophase
Telophase
Interphase
Duplicates DNA in preparation for Mitosis
Mitosis
The key activity of mitosis is the accurate separation of the cells replicated DNA
Cytokinesis
The process of cytoplasm division that results in genetically identical daughter cells.
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.
Homework
SQ3R section 9.3
Quiz Monday you will be able to use the SQ3R.
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