2007-2008 AP Biology Tour of the Cell 3
2007-2008 AP Biology
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
2007-2008AP Biology
Making New Cells
AP Biology
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
2007-2008 AP Biology
LE 6-23b
15 µm
Direction of organism’s movement
Motion of cilia
Direction ofactive stroke
Direction ofrecovery stroke
2007-2008 AP Biology
LE 6-24
0.5 µm
Microtubules
PlasmamembraneBasal body
Plasmamembrane
0.1 µm
Cross section of basal body
Triplet
Outer microtubuledoublet
0.1 µm
Dynein arms
Centralmicrotubule
Cross-linkingproteins insideouter doublets
Radialspoke
Activity: Cilia & Flagella
2007-2008 AP Biology
LE 6-25a
Dynein “walking”
Microtubuledoublets ATP
Dynein arm
AP Biology
actin microtubule nuclei
Cytoskeleton
AP Biology
Centrioles Cell division
in animal cells, pair of centrioles organize microtubules spindle fibers
guide chromosomes in mitosis
2007-2008 AP Biology
Any Questions??