Tour of the Cell 3 2007-2008

Cells gotta work to live! What jobs do cells have to do? Build proteins proteins control every cell function Utilize energy for daily life for growth Make new cells growth repair renewal Maintain Homeostasis Digestion/Waste Removal

Making New Cells 2007-2008

Cells need to make more cells! Making more cells to replace, repair & grow, the cell must… copy their DNA make extra organelles divide the new DNA & new organelles between 2 new “daughter” cells organelles that do this work… nucleus centrioles cytoskeleton

Centrioles Function Structure Help coordinate cell division in animal cells, pair of centrioles organize microtubules spindle fibers guide chromosomes in mitosis Structure One pair in each cell

Cytoskeleton Function structural support motility regulation maintains shape of cell provides anchorage for organelles protein fibers microfilaments, intermediate filaments, microtubules motility cell locomotion cilia, flagella, etc. regulation organizes structures & activities of cell

Cytoskeleton actin microtubule nuclei