What is a flagella ?
a long filament used for motility
what are the parts of the flagella?
hook, filament, and basal
what is the filament?
long, hallow external piece. composed of protein: flagellin
what is flagellin?
flagellum protein arranged in several chains that intertwine and form
a helix around a hollow core
what is the basal body?
an anchor from the flagellum to cell wall
monotrichous
single flagellum
no flagellum
atrichous
amphitrichous
one flagella at each end of the cell, total of two
lophotrichous
several flagella at one end
peritrichous
many flagella all over the cell
simple pattern
called tumble and run
tumble
spin flagella to randomly change direction
run
spin flagella to propel forward
who do bacterial flagella move?
whip-like action, but no wave-like motions
what is the movement direction for bacteria based on ?
taxis
what is taxis
to or away from a particular stimulus
phototaxis
light stimulus
chemotaxis
chemical stimulus
thermotaxis
heat stimulus