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21 Cards in this Set
- Front
- Back
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Active transport requires _____ in the form of ______
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energy in the form of ATP
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Active transport moves...
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against the concentration gradient
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2 methods of active transport
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pumps and change in the cell membrane(endocytosis and exocytosis)
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Active transport pumps require what kind of channel?
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a protein channel called a "pump"
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Active transport pumps require what type of energy?
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ATP
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Active transport pumps move from...
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low concentration to high concentration
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Active treansport pumps work in the opposite direction of what?
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Facilitated diffusion
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Energy forces _________ in the membrane against _________
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it forces materials through a protein in the membrane against the concentration gradient
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2 types of active transport pumps
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proton pumps and sodium/potassium pumps
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Proton pump
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hydrogen ions are moved
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Sodium/Potassium pump
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3 Na+ pumped out, 2 K+ pumped in
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Endocytosis (change in cell membrane)
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takes in large material
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Cell memebrane moves in until...
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until it encapsulates material, becoming a vesicle
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Two types of Endocytosis
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Phagocytosis and Pinocytosis
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Phagocytosis
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"cell eating" (cause gay people...)
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Phagocytosis: pseudopods _______ with extensions of the ________
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they engulf material with extensions of the cell membrane (like a white blood cell - osmosis - taking in foreign material to kill)
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Pinocytosis
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"cell drinking"
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How does pinocytosis work?
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Membrane wraps around big drop of solution & pulls it in
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Exocytosis
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vesicle that gets rid of large material (exo-exit-out!)
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Exocytosis vesicle fuses with the ______ releasing contents _____
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fuses with the cell membrane and releases contents outside the cell
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2 examples of exocytosis
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waste and digestive enzymes
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