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Terms in this set (19)
boundary that seperates the living cell from its surroundings.
determines most of the membranes specific functions.
bound to the surface of the membrane
allows passage of hydrophilic substances across the membrane.
penetrate the hydrophobic core.
the diffusion of a substance across a biological membrane .
moves substances against their concentrations gradients. requires energy usually in the form of atp
the tendency for molecules to spread out evenly into the available space.
solute concentration is greater than that inside the cell;cell loses water
the ability of a surrounding solution to cause a cell to gain or lose water.
transport proteins speed the passive movement of molecules across the plasma membrane.
solute concentration is the same as that inside the cell; no net water across the plasma membrane.
the cell takes in macromolecules by forming vesicles from the plasma membrane.
transport vesicles migrate to membrane, fuse with it rebase their contents.
the control of solute concentration and water balance.
diffusion, osmosis, facilitated diffusion.
examples of passive transports?
transport, cell recognition, enzymatic activity, signal transduction, intercellular joining, attachment to the cytoskeleton and extracellular matrix (ECM)
6 major functions of membrane proteins are what?
cell gains water
the diffusion of water across a selectively permeable membrane
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