Characteristics of Epithelial Tissues III Flashcards
1
Q
what are main attributes of microvilli
A
- finger-like proections
- non-motile
- uniform brush border
- primary function: increase surface area of absorption
- found in intestinal epithelium and on parts of renal tubules
2
Q
what is the distal end of the actin filament core in the microvilli capped with & what does it do
A
Formin: regulates assembly of actin filaments at the barbed ends
3
Q
what are the actin filaments that make up the core of microvilli cross-linked by
A
villin and fibrin
4
Q
what does each doublet in cilia consist of
A
alpha and beta tubule
5
Q
what do dynein and kinesin interact with
A
microtubules
6
Q
how is the basal body anchored to the cytoplasm
A
striated rootlets
7
Q
what is a function of the inner sheath and radial spokes
A
stabilization of axonemal bending
8
Q
define tektins
A
filamentous proteins extending along the microtubules
