Unit 3: Cell Cycle Flashcards
Represents a self-regulated sequence of events that controls cell growth and cell division
Cell Cycle
What is the goal of cell cycle?
To produce two daughter cells, each containing chromosomes identical to those of the parental cell
This is the different steps and phases for cells to replicate.
Cell Cycle
What are the two principle phases of the cell cycle?
Interphase
Mitosis
This phase generally represents the continuous growth of the cell where the cell makes a copy of its DNA or DNA Replication.
Interphase
Cells spend most of their life in what phase?
Interphase
What are the three phases of Interphase?
G1
S
G2
The phase characterized by the partition of genome where cell separates its DNA into 2 sets and divides its cytoplasm forming 2 new cells.
M Phase (Mitosis)
The phase wherein cell divides into 2 new daughter cells.
Cell Division
What are the three cell types?
Labile Cells
Stable Cells
Permanent Cells
The cells that want to grow and divide in order for them to carry out their function.
Labile Cells
What phases in the interphase do labile cells go through?
G1, S, G2, M Phases
Give three examples of labile cells.
- Epithelium of Skin
- Lining of the Urinary Tract (Ureter, Bladder, Urethra)
- Lining of the Gastrointestinal Tract
These are the cells that want to stay at the G1 phase, but if there are conditions that stimulate them to proceed with the S Phase and G2, they will eventually grow and divide.
Stable Cells
Stable cells want to stay at what phase?
G1
What are two examples of stable cells?
- Liver Cells
- Renal Tubules (Proximal Convoluted Tubule, Distal Convoluted Tubule, Cells of Loop of Henle)
Permanent Cells are also known as…
Amitotic Cells
These are the type of cells that undergo a period of cell cycle and end there.
Permanent Cells
True or False: Permanent Cells die with us
True
These are the type of cells that don’t proceed to the cell cycle anymore once they reach maturity.
Permanent Cells
What are the three examples of permanent cells?
- Neurons
- Cardiac Muscle
- Skeletal Muscle Fibers
The checkpoints were proposed by who? (2)
Leland Hartwell
Ted Weinert
Internal quality control mechanisms represented by biochemical pathways that control transition between cell cycle stages
Checkpoints
These monitor and modulate the progression of cells in response to intracellular or environmental signals.
Checkpoints