Transcript Cell Cycle Regulation

Cell Cycle Regulation
Cell Cycle Regulation
• Regulating the ____ ____ is necessary for
healthy ______.
Mitotic Regulation
• There are both _____ and _____ factors
that _______ cell division.
• External factors include ______ and
chemical signals.
• Proteins that _______ cell division are
known as _______ _______.
Mitotic Regulation
• Most ________ cells form a _____ layer in
a culture dish and stop _______ once they
touch other _____.
Mitotic Regulation
• Two of the most important _____ factors
are ______ and ______ (both proteins).
• External factors ________ the internal
factors which affect the cell cycle.
Regulating the Cell Cycle
Cell
Cycle
External
Factors
Internal
Factors
Contact Inhibition
• Type of cell to cell _________ that tells the
cell to _____ dividing when an ____ is ___
(Remember the healthy growth in the
culture dish?).
• If a ______ occurs with the cell’s ______,
cancer can result.
The Body’s Control Mechanism
• ________: Programmed cell death
– It is a _______ feature of _______ organisms
– Caused by a cell’s production of self –
destructive ________
– Occurs during the development of _______
Uncontrolled Mitotic Division
•
•
Cancer : the ________ dividing of cells
Reasons cancer can occur:
1. _________ to produce certain enzymes
2. __________ of enzymes at the wrong time
3. Mutations that occur from _______ ____
incorrectly
4. ___________ factor that _______ your DNA
Cancer cells
• Cancer cells form _______ clumps called
_______
• _____ ______ = not cancerous (will not
spread and take over healthy cells)
• ______ tumors = __________ (can
metastasize, or break away to take over
healthy cells)
Treatments
• ________ = doctor who studies cancer
1. _________ = chemicals _______
into body that ___ rapidly dividing
cells
Problems: _______, vomiting, loss of
hair, and kills _____ healthy and
cancerous cells
Treatments
2. ______ = _____ aimed at cancer that
attacks the cells and other healthy cells
in that area
Problems: kills other ______ ____that
are in the way. Can only be used for
______ ______.
Treatments
3. ______ = take out ____ _____ that is
affected
Problems: could miss some of the cancer
cells or could make ____ ____ grow
back even _____ then before
• A biopsy is also done to initially
_______ if the ______ is malignant or
benign.