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EOC Level2
Cell Growth & Division
Why do you think cells need to divide?
Cells divide for three reasons…1. Growth of organism
DNA cannot function in a large cell.Materials cannot be transported through the cell fast enough.
2. Repair of tissues3. Reproduction
Consequences of Large Cells
1. SA:V ratio gets smaller; things cannot get in and out of the cell quick enough.
2.Large animals do not have large cells.
Figure 4.2 Why Cells Are Small (Part 1)
l x w x 6
l x w x h
Cell CycleInterphase (longest part of the cell cycle)Interphase includes all the time that the cell is not dividing.
G1 (Growth 1) S (Synthesis) - DNA copies G2 (Growth 2) - cell prepares for division Mitosis-nucleus dividesCytokinesis-cell divides
Reading , Math & Science
Egg Donation News Feature
Why We Should Exercise
Assignment- Exit Slip
Calculate the surface area to volume ratio for a cuboidal cell with 1.5cm, 2.5cm, 4cm, and 10cm.
Predict what problems a 10cm cell would have vs. a 1.5 cm cell would have.
Assignment- Exit SlipRead 10.1 and 10.2 complete all section questions. p240
Calculate the surface area to volume ratio for a cuboidal cell with 1.5cm, 2.5cm, 4cm, and 10cm. Predict what problems a 10cm cell would have vs. a 1.5 cm cell would have.
Rd. 253, answer the following:Explain why scientists are interested in SC when your body can replicate its own cells.Propose another alternative to SCR relating to cell division.List two ways researchers can use stem cells to help people.
Anticipatory Set 11-12-13___ Which of the following is a requirement for all active transport processes?
A. ADPB. ATPC. AFPD. AQP
Analyze the diagram above, what process is taking place, and what type of cell transport process is this?
A. phagocytosis, passive transportB. phagocytosis, active transportC. receptor mediated endocytosis, passive
transportD. exocytosis, active transport
Using the diagram, the process that will occur following the process shown in the diagram to expel any unneeded contents would most likely be? (B.1.g, DOK2)
A. endocytosisB. pinocytosisC. exocytosisD. phagocytosis
Read and List 2 reasons the nucleus divides.
Mitosis is the process of nuclear division. The cell divides because the DNA would not be able to code for all the traits necessary of a large cell, and because substances can not enter and exit a cell fast enough
mitosis animation mitosis songHow cancer works
InterphaseThe longest period of the cell cycle.DNA duplicates during this phase.Centrioles divide.
Centrioles are a type of cytoskeleton that is only visible when the cell is dividing. Otherwise they are incognito.
After interphase mitosis begins
What is dividing in mitosis?
ProphaseStep 1 of mitosisCentrioles separate.Spindle fibers form.Nucleus disappears.Chromosomes tighten up and prepare to move.
MetaphaseStep 2 of mitosisChromosomes line up in the center of the cell.Chromosomes connect to spindle fibers at their centromere.
AnaphaseStep 3 of mitosisChromosomes are pulled by the spindle fibers to opposite ends of the cell.
TelophaseStep 4 of mitosisChromosomes separate.Two nuclei reform
CytokinesisFollowing mitosis, cytokinesis occurs.Cytoplasm pinches in half and two identical daughter cells result.In plant cells a cell plate will formMitosis Greenday Song
Review of the Cell Cycle1.Interphase 2. Prophase3. Metaphase4. Anaphase5. Telophase6. Cytokinesis
Name that Phase
Interphase Prophase Metaphase
Anaphase Telophase
List the 6 stages of the cell cycle, and circle the stages that include mitosis.
Review of the Cell Cycle1.Interphase 2. Prophase3. Metaphase4. Anaphase5. Telophase6. CytokinesisMitosis Animation I- Cells AliveMitosis Animation II-Higher EdMitosis Animation III-Hybrid Medical
11-27-111. What three reasons cause the cell to divide?
Calculate the change of concentration of hydrogen in a pH of 2 to a pH of 5.
Calculate SA:V ratio for a cube cell with a length of 5nm.WRITE THESE QUESTIONS AND ANSWERS DOWN FOR A GRADE.
CREATE THIS BY END OF CLASS!
Use two colors of paper to complete the following:
Diagram and label the 6 stages of the cell cycle (one color for interphase and cytokinesis, one color for 4 stages of mitosisDescribe what is happening in each stage.Use the yarn to make spindle fibers and colored paper to make chromosomes.Must have 3 chromosomes per diagram.
Mitosis MathWhat is the longest phase of the cell cycle?
What % of the cell’s life does it comprise?
What is the shortest phase of the cell cycle?What % of the cell’s life does it comprise?
CancerThe inability of cells to regulate cell division.Cancer = uncontrolled cell division.Tumors = result in masses of cells that have uncontrollably divided.Many factors such as tobacco, radiation, and some viruses may lead to the breakdown of cell division regulation.
Calculate the following: Show equation
Below are given the length of a cell’s life. Calculate the amount of time it spends in Interphase and mitosis.1. 9 days 9. 3 months2. 4 hours 10. 10 minutes3. 16 days 11. 15 months4. 2 years 12. 3 years5. 5 minutes 13. 14.5 days6. 17 hours 14. 19.2 months7. 40 months 15. 3.1 years8. 18 days
Mitosis vs. MeiosisMITOSIS
Somatic cell division
Start with a full set of chromosomes from mom and dad (diploid=2n), end with a diploid.
MEIOSIS
Sex cell division
Start with a full set of chromosomes from mom and dad (diploid=2n), end with only half the starting number (haploid=n)
Sex cells can only have _______ a set of chromosomes because they will fuse and form ________. ½ + ½ = 1
Meiosis Animation-Cells Alive Meiosis Animation II
Exit SlipDraw the process of meiosis as shown on page 276, and give a brief description of each phase.
Know its time to dance
Vocabulary List #7Mitosis- somatic cell divisionMeiosis- sex cell divisionAnerobic- without oxygenAerobic- with oxygenOse- sugarAse- enzymeDNA- deoxyribonucleic acid
Nucleotide- monomer of DNADouble helix- twisted ladder, shape of DNACancer- uncontrolled cell division
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