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24 Cards in this Set
- Front
- Back
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OSMOSIS & DIFFUSION
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the movement of anything into & out of a cell
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PROCESSES OF TRANSPORT
Types |
Active (cell needs ATP/energy to get things into or out of cell)
Passive (easy; no energy involved. examples are diffusion & filtration) |
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PASSIVE TRANSPORTS
Diffusion |
The tendency of molecules & ions to spread evenly due to constant kinetic energy
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CONCENTRATION GRADIENT
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High to low concentration
Things will always move from high to low. (either moving to or from concentration gradiant) |
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SIMPLE DIFFUSION
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This is when it's either lipid soluble, small enough to fit through the membrane channels, or assisted by a carrier molecule
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OSMOSIS
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Unassisted diffusion of a solvent (usually water)
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FACILATED DIFFUSION
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Moves glucose sugars & amino acids.
Binds to protein carriers in membrane & ferry's them through the membrane OR Moves through water filled protein channels |
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CARRIERS (PERMEASES)
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Envelope the particle to pass it in the cell
Typically move polar particles |
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CHANNELS
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Open or selective transports
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AQUAPORINS
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Free moving water channels so water can go in an out of the cell
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OSMOLARITY
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Concentration of solute particles in a solution
Unit: OSMOL/L |
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HYDROSTATIC PRESSURE
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water pressure against the cell wall
primarily in plant cells |
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OSMOTIC PRESSURE
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Resistance from the cell against water entry.
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TONICITY
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Ability of a solution to change shape of a cell by changing internal water volume
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ISOTONIC
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Solution has same tonicity as the cells
Most solutions of the body are isotonic |
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HYPERTONIC
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when a cell loses water
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HYPOTONIC
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when a cell gains water
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FILTRATION
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based on hydrostatic pressure
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ACTIVE PROCESSES
defintion types |
when solute pumps move solutes into cell AGAINST the concentration gradient.
1 Primary - direct 2 Secondary - indirect |
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SYMPORT
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When things move in the same direction
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ANTEPORT
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When things move in the opposite direction
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PRIMARY TRANSPORT
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Reaction that uses ATP to bond & bring the cell in.
Sodium Potassium Pump: (Na+-K+ATPAFE) |
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SECONDARY TRANSPORT
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brings things into the cell
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VESICULAR TRANSPORT
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moves macromolecules & lg particles out of the cell or EXOCYTOSIS
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