Cell Membrane exhibits: Selective Permeability – Flashcards
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The ______ ___________ picks and chooses what can pass through it.
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cell membrane
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Made up of many ________ ______ molecules with the heads facing both outside and inside of the cell because they like the watery environment
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bipolar lipid
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like the watery environment
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hydrophilic
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like the watery environment
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hydrophilic
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dislike water
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hydrophobic
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To stay alive, a CELL MUST EXCHANGE materials such as food and waste with its ________________
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environment
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The Cell Membrane is _________________, which means that it only allows certain molecules to pass through
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semipermable
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Amino acids, simple sugars, fatty acids, glycerol, gasses [o2, co2], water, salt, wastes
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Passable
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proteins, lipids, starch, blood cells
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in passable
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Movement of substances across a cell membrane WITHOUT the need for energy
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Passive transport
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Movement of molecules from an area of high concentration to low concentration, Collide with each other all the time, Collide and spread out
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Diffusion
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Specialized transport proteins speed the movement across a membrane, movement of molecules from a high concentration to low concentration
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Facilitated Diffusion
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Diffusion of WATER across a selectively permeable membrane from a region of high water concentration to a region of low water concentration
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Osmosis
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Solution with same conc. of dissolved substances as the living cell placed in it
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Isotonic
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Lower conc. of dissolved substances than the cell
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Hypotonic
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Higher conc. of dissolved substances then the cell
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Hypertonic
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Movement of substances into and out of the cell WITH the need for energy[ATP], Transport proteins bind a substance on one side of the membrane and release it on the other
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Active transport
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"inside" "cell"
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Endocytosis
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"drink" Small amounts of liquid are taken into a cell
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Pinocytosis
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"eating" Solid particles are ingested into the cell
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Phagocytosis
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"outside" Movement of materials out of the cell
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Exocytosis
