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biology chapter 7 (cell membranes -fluid mosaics of lipids and proteins…
biology chapter 7
cell membranes -fluid mosaics of lipids and proteins
cholesterol makes it not become solid at low temperatures
cell cell recognition -nametags made of glycol proteins
intracellular joining -gap and tight junctions
signal transduction
signal molecules does;t have to enter cell
enzymes
transport proteins
attachment to cytoskeleton (inside) and extracellular matrix (outside)
bilayer has an inside and outside
passive transport diffusion of substance with no energy
different solute concentrations affect cells
plant cells are turgid, flaccid, of plasmolysed
blood cells are lysed, normal, or shriveled
facilitated diffusion
membrane structures cause selective permeability
aquaporins -transport proteins just for water
active transport -uses energy, moves substances against concentration gradient
club pump buddies
one that uses Na to get in glucose and then another that pumps out Na and draws in potassium (k)
one that uses H+ to get in sucrose and then another that pumps out H+
phagocytosis and endocytosis transport large amounts of stuff
transport
diffusion
by itself through cell membrane
facilitated diffusion
protein with hole in it
gated protein
active transport