Chapter 17 Vocab Flashcards
the microtubule motor protein that moves toward the minus end
dynein
the growing and shrinking of microtubules
dynamic instability
the functional units of skeletal muscle; consist of filaments of myosin and actin
sarcomere
thick protein filaments in the center section of sarcomeres
myosin
a small region of cytoplasm adjacent to the nucleus that contains the centrioles and serves to organize microtubules
centrosome
a three-dimensional network of microtubules and filaments that provides internal support for the cells
cytoskeleton
intermediate filament structure that gives the nucleus shape and support
nuclear lamina
long, whip-like locomotion organelles formed from a 9+2 array of microtubules
flagellum
microfilaments which form the contractile filaments of sarcomeres in muscle cells
actin filament
the region of a cell that lies just beneath the plasma membrane and contains a network of actin filaments and associated proteins
cell cortex
a short cellular appendage specialized for locomotion, formed from a 9+2 array of microtubules
cilium
one of two cylindrical cellular structures that are composed of nine triplet microtubules and form the aster during mitosis
centriole
a hollow rod of tubular protein in the cytoplasm of all eukaryotic cells and in cilia, flagella, and the cytoskeleton
microtubule
the microtubule motor protein that moves toward the plus end
kinesin
the protein subunits from which microtubules are assembled
tubulin
