Download The Cell Cycle, Rate and Control

The Cell Cycle, Rate and Control
The two parts of the Cell cycle are interphase and mitosis.
This part takes approximately 90% of the time: interphase
The three stages within this part are: G1, S, G2
 each stage means
o G1 = growth before DNA replication
o S = DNA replication
o G2 = growth after DNA replication
The shortest time involves these phases
prophase, metaphase, anaphase, telophase
Rate of Cell Division
Different types of cells divide at different rates.
 Some types of cells like bone marrow reproduce rapidly (1 hour)
 Other extreme certain cells like nerve and muscle cells
never reproduce once they mature (stay in interphase)
 Other cells divide only when needed for repair (liver cells)
Importance in any cell to maintain balance = homeostasis
If one kind of cell begins to reproduce too rapidly, the normal organization
will be disrupted = cancer
Regulation of Cell Cycle
Still trying to figure it out
One known is cell-to-cell contact
Once cells enter DNA replication they are committed
to complete the cell cycle meaning division
Scientists are studying this point in interphase to determine what
triggers the cell to undergo DNA replication
 Their focus has been on
o chemical controls like proteins
o Genes required for cell division
Why research this?
This knowledge may be used to
 replace cells damaged by injury or disease
 live longer lives
 control the spread of cancers
The Cell Cycle, Rate and Control
The two parts of the Cell cycle are _____________and ______________
This part takes approximately 90% of the time ________________
The three stages within this part are _____, ____, ____
 each stage means
o ___ = __________________________
o ___ = __________________________
o ___ = __________________________
The shortest time involves these phases
_____________, _______________, _____________, _______________.
Rate of Cell Division
Different types of cells divide at ______________ rates.
 Some types of cells like ______ __________ reproduce ____________ (1 hour)
 Other extreme certain cells like __________ and ______________ cells
___________ ____________ once they mature (stay in _____________)
 Other cells divide only ______ ____________ for _________ (_______ cells)
Importance in any cell to maintain ______________ = _______________
If one kind of cell begins to reproduce too _____________, the normal
organization will be disrupted = ________________
Regulation of Cell Cycle
Still trying to __________________
One known is _________________ contact
Once cells enter ________ ______________ they are _____________
to complete the _____________ meaning _______________
Scientists are studying this point in ______________ to determine what
triggers the cell to undergo ________ _____________
 Their focus has been on
o __________ _______________ like __________
o ___________ required for cell division
Why research this?
This knowledge may be used to
 ___________ ____________ damaged by injury or disease
 live ___________ lives
 control the spread of _____________