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17 Cards in this Set
- Front
- Back
structure of a cell membrane
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phospholipid bilayer
proteins |
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2 types of cellular transport (moving things in and out of the cell)
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passive transport (no energy needed)
active transport (atp/required needed) |
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3 types of passive transport
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diffusion
osmosis facilitated transport/diffusion |
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characteristics of all forms of passive transport
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move substance from high to low
doesn’t require energy(ATP) |
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solute
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any substance that is dissolved in another substance
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Concentration Gradient
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a difference in the # of particles from 1 area to another
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diffusion
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involves the movement of small particles from areas of HIGH concentration to area of low concentration
does not require energy example Axe spray spreading out across the room in after being sprayed and in a concentrated area |
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Diffusion occurs until what is reached
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equilibrium
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Equilllibrium
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when particles are equally moving thought the season but are still in motion
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Osmosis
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the diffusion of water molecules across a e=selectively preamble membrane
doesn’t need atp occurs from high to low concentration |
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3 types of osmotic solutions & explain
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isotonic - same amount as other solution
hypertonic - has more solutes than another solution hypotonic - has less solutes than other solution |
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The more solute the lower the _______ concentration
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water
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Cells in a hypertonic state will ________
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shrivel
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cells in a hypotonic solution _____
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swell
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Active transport
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the movement of ions or molecules across the cell membrane regardless or intracellular or extracellular concentrations
requires energy requires protein channel |
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The NA+/K+ exchange pump
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NA+ is opposite of K+ so needs to be exchange out for each other
for each 3NA+ a K+ is reclaimed |
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compare passive vs. active
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passive:
1. disffusion H -> L no atp no membrane is needed 2.Osmosis H -> L (water only) no atop membrane is needed 3. facilitated diffusion H -> L membrane + protiens no atp channel needed Active atp is needed L -> H protein carrier + membrane |