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Cards In This Set
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Cytoplasm
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Contains all the cells contents.
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Nucleus
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Large organelle that contains DNA in chromosomes and is associated packaging proteins
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Plasma membrane
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Flexible yet sturdy.have intelligence(semipermeable)covers and protects that cellcontrols what comes in/outlinks to other cellsflies certain "flags" to tell other cells who it is
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Fluid Mosaic Model
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Describes the arrangement of molecules within the membrane.lipids act as a barrier to certain polar substancesproteins act as a gatekeeper, allowing passage for certain molecules and ions
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Integral proteins
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Extend into or through the bilayer.
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Transmembrane
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Span the entire bilayer
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Peripheral proteins
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Only on top and bottom, does not go through.
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Glycoproteins
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Membrane proteins with carbohydrate group attached that protrude into the extracellular fluid.
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Transporters
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Selectively move substances through the membrane
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Receptors
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For cellular recognition; a ligand is a molecule that binds with the receptor
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Enzymes
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Catalyze chemical reactions. but others act as a cell identity maker.
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Impermeable
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Needed by the cell but cannot pass through the membrane. transmembrane proteins act as channels.
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Passive processes
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Involve substances that move across the membrane without energy.ex. boulder down a hill, gravity pulls it down, no extra energy needed.
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Active processes
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Involve the use of energy primarily from the breakdown of ATP, to move substances against its gradient.ex. moving the boulder UP the hill
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Osmosis
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Net movement of water through a selectively permeable membrane- through lipid bilayer
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