AP Biology 2010-2011

Tour of the Cell 3

AP Biology

Cells gotta work to live! What jobs do cells have to do?

make proteins proteins control every

cell function make energy

for daily life for growth

make more cells growth repair renewal

AP Biology 2010-2011

Making New Cells

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Cytoskeleton Function

structural support 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

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actin microtubule nuclei

Cytoskeleton

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Centrioles Cell division

in animal cells, pair of centrioles organize microtubules spindle fibers

guide chromosomes in mitosis Found in an area called the centrosome

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External Structures Cilia

Numerous, short hair-like structures

Flagella One or two per cell, long-whip

like tail Structure of both are the same!

Two single microtubules surrounded by a ring of 9 microtubules. Called a 9+2 arrangement

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AP Biology 2010-2011

Any Questions??