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10/24/2023
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MITOSIS cell grows, preforms routine life processes, interphase- and prepares to divide Prophase - chromosones are visible, nuclear membrane breaks down, spinde fibers begin to form metaphase - Sister chromatids line up at the cell center of the Ana phase-sister chromatid's line up pulled apart and move to opposite poles of the cell Telophase-spindle fibers break down, nuclear membranc to uncoil & form chromatin Forms, chromosomes begin Cytokenesis- cytoplasm splits in two & cell divides definitions 2 Sister Cell division-before it comes to large, a growing cell divides, forming Mitosis-division of the nucleus Prophase, metaphase, Amaphose, telophase Cytokenisis- cytoplasm organelles divide Internal regulators tell the cell to enter mitosis only if all chromosomes external regulators - stimulate growth & division, embryonic development; wound replicated hearth MITOSIS Summory limits to cell growth "DNA over load - to much cell not enough DNA -volume movease faster than surface area -difficuit For larger cells w/ more volume to get & get rid of things Chromosomes -carry DNA (genetic info) that is passed from one generation to the next -23 pairs in the human body. DNA → Chromatin → chromatid duplicate chromosomes cell cycle -interphase •Gap 1- cell growth, longest time spent by cell •Sphase (synthesis) - DNA replication 7 dna Set → 2 dna sets •Gap 2-cell prepares for mitosis •Mitosis (PMAT) divides nudlevs - cytokenisis- 5- divides cytoplasm & organelles Controls cell division. - Gells stop growing when they come in contact w/ other cells...
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(@kin cuts) -cyclins regurate cell cycle timing -interal external regulators Uncontrolled cell division create tumors. -cancer cells dont respond to signals that regulate growth -caused by: Smoking/drugs, radiation, fungus infection, gene defects, alchonol over.