chapter twenty-one Flashcards
tissues are constructed on a _____
matrix
how are tissue types categorized? 4 ways
connective, epithelial, nervous and muscular
______ tissue is mostly extracellular matrix material with cells interspersed within
connective
________ tissue is mostly composed of collagen fibers
connective
collagen proteins assemble into _____ _____ _______
triple helix coiled-coils
to avoid premature assembly, collagen is secreted from cells as _______
procollagen
procollagen contains sequences that block _______
assembly
in the extracellular space ______ cleave the prosequences, allowing assembly of collagen
proteases
_____ ______ links cells to the extracellular matrix
integrin adhesion
integrin adhesion also influences the cells by activating _____ _______ processes to the cell interior
signal transduction
protein molecules that are highly modified with ____ ______ fill space in the extracellular matrix
carbohydrate structures
carbohydrate molecules bind a lot of _____ and make a gel material between collagen fibers
water
_____ cells seperate biological compartments and regulate their composition by transport processes
epithelial
epithelial cells sit on a ____ ____
basal lamina
_______ epithelia have distinct domains with different compositions
transporting