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10 Cards in this Set
- Front
- Back
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mitosis is...
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division of the cell nucleus
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cytokinesis is...
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division of the cytoplasm
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why must cells go through mitosis? (3 things)
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1. to increase surface area
2. to have organism growth 3. to repair damaged cells. |
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DESCRIBE PHASES OF A CELLS LIFE (INTERPHASE,G1,S,G2, etc.)
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1.interphase- chromosomes are copied and spread out in the nucleus; centrioles are copied.
G1 (Growth 1)--the period between the ending of mitosis and the beginning of the S phase. S (Synthesis Phase)-- one of the most vital events in cell cycle. the DNA of the genes and chromosomes is duplicated to form CHROMATIDS joined by centromeres. G2 (Grwoth 2)-- this is the period between the s and mitosis. cell increas & needs centrioles, spindl fibers. |
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DESCRIBE PROPHASE:
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longest mitosis phase
1. copied chromosomes appear as chromatids attached at the centromere. 2.nuclear membrane disapears. 3. spindle apparatus begins to form. |
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DESCRIBE METAPHASE:
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**KEYWORD middle
1. line up in the middle of the cell single file 2. chromosomes attach to the spindle fibers. |
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DESCRIBE ANAPHASE:
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**KEYWORD apart
1.centromeres split and sister chromatids seperate with the help of the spindle fibers |
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TELOPHASE
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1. chromosomes COMPLETELY SEPERATED
2. nuclear membrane begins to reform 3. chromosomes begin to disperse |
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CELLS ARE DESIGNED TO CARRY OUT TO FUNCTIONS....
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1. MACROPHAGE- the special cell that floats thru the blood stream and protects the body from invaders; use phagocytosis to kill bacteria.
2. NEURON- (nerve cells) long, thin cells in the body that carry messages thru electrical impulses |
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plant mitosis vs. animal mitosis........
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NO CENTRIOLES visible in plant cells. spindle fibers attch to the sturdy cell wall.
NO CLEAVAGE FURROW IN TELOPHASE forms in plants. instead, a new cell wall, called a CELL PLATE, forms b/w daughter cells. |
