Download PowerPoint- Cancer - Manhasset Schools

Date: February 16th, 2017
Aim # 51: How can mitosis lead to a
Do Now:
1) What is interphase? How much of the cell cycle is
spent during this stage?
2) What does PMAT stand for?
3) What is cytokinesis? How does it differ in plant
and animal cells?
HW:
1)Daily Review of Class Notes
2)All Labs due Friday
Aim#51: How can mitosis lead
to a disruption in homeostasis?
What could have caused this?
Cancer
Approximately 200 types
Lung cancer
Skin cancer
Breast cancer
Can you think of some?
Prostate
cancer
1) Healthy cells
• Grow, divide, and
replace themselves
during the process of
mitosis. Each mitotic
division leads to the
development of 2 NEW
healthy cells.
How do cells divide by mitosis?
2) Abnormal cell division
• Sometimes, normal cells lose
their ability to limit and direct
their growth. They divide too
rapidly and grow without any
order.
3) What happens if cells are unable
to regulate the cell cycle?
Cancer is a disease that is
caused by loss of control of the
cell cycle (uncontrolled cell division).
Cells continue to divide
uncontrollably.
4) What are tumors?
• Tumors (lumps or masses of
cancerous cells) will form as a
result of this uncontrolled cell
division.
• Tumors can be either
malignant (spread dangerous) or benign (can’t
spread – safe)
Metastasis
They spread by using
the circulatory system
and lymph nodes.
Cancer cells also
can spread, to other
parts of the body
and form new
tumors.
How do they
spread?
7) What causes cancer?
•Damage to the cells DNA from:
• Mutations - to genes, the
•Poor
Diet for making
cell's instructions
the proteins it needs to
•Certain
Pathogens
survive, grow
and multiply.(Viruses)
• Ultraviolet radiation
•Genetics
• Viruses
• •UV
Usually
cancer is not
Radiation
(Sun)
inherited
• •Drugs
Carcinogens:
chemicals
(Tobacco)
Anatomy of a Cigarette
• Smoking causes a third of all
cases of cancer
• Cigarette smoke contains
3000 different chemicals,
some of which are
carcinogens. Some people
have a lower risk of
developing lung cancer. Their
cells may be more efficient at
repairing the gene damage
caused by the carcinogens.
Lung Cancer:
Healthy Lung
Cancerous Lung
What is “x”?
8) Treatment
• Surgery: physical
removal of the
malignant tumor
• Radiation: disrupts cell
division
• Chemotherapy: drugs
that prevent cell division
by interfering with
mitosis
Amoeba Sisters
Cell Cycle and Cancer
https://www.youtube.com/watch?v=lpAa4TWjHQ4