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Cellular Transport 3

BIO 151L 3

QuestionAnswer
Percentage of water cells are made up of 85%
Universal solvent Water
Substances that are dissolved in solvents Solutes
Made up of solvents and solutes Solution
Regulates the passage of molecules into and out of the cell Cell Membrane/Plasma Membrane
A double layer of phospholipid molecules called a bilayer Plasma membrane
Allows certain molecules to mass through freely while excluding others (plasma membrane) Semi-permeable
Maintains balance Homeostasis
The most common way that solutes enter or leave cells; the gradual movement of molecules from an area of higher concentration to an area of lower concentration Diffusion
No longer a concentration gradient but molecules are still moving and colliding at an equal rate Equilibrium
Solutes naturally flow; Requires no energy Passive transport
Diffusion, facilitated diffusion, osmosis Passive transport
Proteins fight against passive diffusion and move molecules against the gradient; requires energy Active Transport
Sodium-potassium pumps in your neurons Active Transport
Passive dissuasion of water molecules across a membrane Osmosis
Three terms of tonicity Hypertonic, hypotonic, isotonic
Greater concentration of solute Hypertonic
Lower concentration of solute Hypotonic
Concentration of solute is equal in both solutions Isotonic
Salt solution isotonic to most of your body cells 0.85% NaCl
A differentially permeable membrane with very small pores that permutes the passage of water and certain molecules, similar to cell membranes Dialysis tubing
Created by: AliRutherford
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