Active Transport and the Sodium-Potassium Pump
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10 Terms
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Diffusion
Movement of molecules from high to low concentration.
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Osmosis
Diffusion of water across a semipermeable membrane.
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Equilibrium
State where no net movement of molecules occurs.
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Concentration Gradient
Difference in concentration across a space.
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Active Transport
Movement of substances against concentration gradient using energy.
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Energy Requirement
Active transport requires energy, typically from ATP.
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Kidney Cells
Use 90% energy for glucose and amino acids transport.
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Sodium-Potassium Pump
Transports 3 Na+ out and 2 K+ in using ATP.
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Integral Protein
Membrane protein facilitating ion transport across membranes.
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Cell Energy Usage
Cells use about 40% of energy for active transport.