Cell Division Flashcards
What is the cell cycle
Ordered set of events which culminates in the division of a cell into two daughter cells
What is mitosis
Mitosis is cell division which is the division of somatic (body) cells
What is meiosis
Cell division of gametes which are sperm/ova (23rd chromosome)
Interphase (3 parts)
1) First Growth phase
2) Synthesis phase
3) Second Growth phase
First Growth Phase
Cell continues to do its job (maintance, cellular respiration, protein synthesis)
Synthesis Phase
DNA replication, protein synthesis doesnt occur in this phase
Second Growth Phase
Cell finishes growthing and then prepares the cell to undergo mitosis
chromosomes and chromotids
# of centromeres = # of chromosomes # of arms = # of chromotids
Mitosis
Prophase, Metaphase, Anaphase, Telophase
Cell Death
The death of a cell may occur by one of two main mechanisms
Necrosis and Apoptosis
Necrosis
Uncontrolled cell dead “cell homicide”
Premature death of cell by injury, toxins or nutritional deprivation
Cell loses function control
Swelling of the cell and organelles due to the increase of osmotic pressure
Cell bursts and realses cell contents - damages rhe surronding tissue/cells - domino effect