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Aim: What happens if the rate of
mitosis is abnormal?
Do Now: Describe the process of
mitosis? What has to happen to the
chromosomes before a cell dovides?
Explain why.
HW: read page 1046-1048, #1-5
Tues: read pp 275-278, page 278 #1-5
green review book- graphing
Wed: Page 284 #22
Thurs: Green Review Book: Biochemistry
Castle Learning due Monday
Quiz Wednesday: Green book pages 1-6- scientific
method/cells
Quiz Friday: Green book- graphing
Test Monday 3/3- Reproduction
Regents Review Tomorrow room 112 AM or PMgraphing
What is the result of normal
Mitosis?
1 cell forms 2
identical
NEW healthy
cells.
What happens if mitosis stops?
• Aging
• Death
What is this?
Cancer
Approximately 200 types
Lung
cancer
Skin
cancer
Breast
cancer
Can you think of some?
Prostate
cancer
What happens if cells are unable
to regulate the cell cycle?
Uncontrolled cell
growth- abnormal
cells continue to
divide
What is the result of
uncontrollable mitosis?
Cancer:
• Too many cells
• Abnormal
Shape
• Abnormal
function
• Starve the
body’s other
cells
Cancer
• Cancer: uncontrolled cell
division
Tumors -Lumps or a mass
of cancerous cells.
Tumors can be:
• malignant (spread dangerous) or
• benign (can’t spread –
safe)
Metastasize
Cancer cells also
can spread, to
other parts of the
body and form
new tumors.
How do they
spread?
They spread by using the
circulatory system and
lymph nodes.
Lung Cancer:
Healthy Lung
Cancerous Lung
What causes cancer?
•Poor
Diet
• Mutations - to genes, the
cell's instructions for
•Certain
(Viruses)
making Pathogens
the proteins it
needs to survive, grow
and multiply.
•Genetics
• Ultraviolet radiation
•UV
Radiation (Sun)
• Viruses
• Usually cancer is not
•Drugs
(Tobacco)
inherited
• Carcinogens: chemicals
Anatomy of a Cigarette
• Smoking causes a
third of all cases
of cancer
• Cigarette smoke
contains 3000
different
chemicals.
Treatment
• Surgery: physical
removal of the
malignant tumor
• Radiation: disrupts
cell division
• Chemotherapy:
drugs that prevent
cell division by
interfering with
mitosis
Prevention
• Don’t Smoke
• Wear Sunscreen
• Regular check-ups