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5 Characteristics of Epithelial Tissue
cellularity and special contacts
polarity (one free surface)
2 Characteristics of Connective Tissue
rich supply of blood vessels
matrix within cell
-fibers: elastic, collagen, retilcular
Plasma Membrane Selective Permeability
lets nutrients in
keeps valuable cell proteins and substances in
keeps undesirable substances out
excretes or passes waste to exterior
Where Diffusion/Filtration are used in the body
Filtration-only in capillary walls
movement of molecules from a region of higher concentration to a region of lower concentration; movement down a concentration gradient
molecules combine with carrier proteins to move through a selectively permeable membrane
concentration of solutes is greater inside the cell, water leaves cell and cell shrinks (crenation)
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