Flashcards
Mitosis and stem cells: stages and potency types
Flashcards do conjunto (21)
- 1PluripotentParticular germ layer
- 2OmnipotentANY cell - G-dly!
- 3MultipotentOnly related cell types
- 4Unipotentonly 1 cell type :(
- 5Stem cellsOriginally unspecialised cells that can differentiate into specialised cells
- 64 Types of stem cellOmnipotent, Pluripotent, Multipotent, Unipotent
- 7Cell division in yeastBudding:
-Nucleus divide + chromosomes separate
-Membrane divides to produce bud.... Organelles and vacuole enter it
-Separate cell formed... birth scar - 8Components of cell cycleG1, S, G2 = Interphase
Mitosis + cytokinesis = cell division - 95 stages of mitosis(early) prophase, (late) prophase, metaphase, anaphase, telophase
- 10What happens in prophase?- Chromatids condense
- 2 centrioles
-nucleolus begins to fade - 11What happens in late prophase (prometaphase)?- Chromosomes very distinct
- Centrioles move to opposite poles
- Nucleolus still fading, nuclear membrane begins to fade. - 12What happens in Metaphase?- Nucleolus gone and nuclear membrane dissolved
- Chromosomes line up at metaphase plate
- Centrioles now at opp. poles
- spindle fibre formation and attachment - 13What happens in Anaphase?- Contraction of spindle fibres
- pull apart chromosomes from the centromere... Now called daughter chromosomes - 14What happens in Telophase?- Daughter chromosomes @ opp. poles
- Nuclear envelope reforms
-Spindle fibres disappear - 15G1Growth 1 - growing + more organelles made
- 16SDNA synthesis/ replication in prep. for cell division
- 17G2Proteins needed for cell division are made
mitochondria divide - 18Name 6 (specialised) cells adapted for their functionSpermatocytes, erythrocytes, neutrophils, palisade cells, root hair cells, guard cells
- 19Adaptations of sperm cell (spermatocyte)- Acrosome in head
- many mitchondria in tail for energy to swim
- tail/ flagellum
- protein filaments along the tail - 20Adaptations of erythrocyte (red blood cell)- biconcave disk shaped
-no nucleus
- few mitchondria minimalises O2 usage
- cytoplasm packed with Hb
- flexible membrane to fit into tiny capillaries - 21Adaptations of neutrophils/phagocytes- Quickly moves to site of infection
-lysosomes to break town pathogens
lobed nucleus for flexibility when surrounding bacteria.
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- FlashCards sobre Sem título, criado por michael.bower12 em 11-12-2014.
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