Cellular Transport through Proteins

In order to maintain homeostasis, cells require a mechanism for regulating the molecules that move into and out of the cell. The phospholipid bilayer membrane contains integral proteins that perform this regulation in three ways. Passive transport requires no energy or integral proteins, and involves molecules working with the flow of the concentration gradient to move from areas of high solute concentration to areas of low solute concentration. Facilitated transport also requires no energy, but uses the integral proteins embedded in the cell to facilitate the transport of molecules across the cell membrane. The last method of transport, active transport, requires both energy and an integral protein to transport a molecule across a cell membrane. Energy is required because active transport moves molecules from areas of low solute concentration to areas of high solute concentration, and thus works against the concentration gradient. With active transport, the integral protein captures the molecule it wishes to transport and pumps it across the cell membrane.
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Comments ( 11 )
  1. Cellular Transport through Proteins « Hourly Book
    November 4, 2012 at 10:10 am
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    […] Biology education Like this:LikeBe the first to like this. Categories: Uncategorized Comments (0) Trackbacks (0) Leave a comment Trackback […]

  2. jingyeecw
    November 4, 2012 at 10:46 am
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    i can remember it more easily !  i like this video =)

  3. daisyBCD
    November 4, 2012 at 11:03 am
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    you havnt named them diffusion and osmosis

  4. kelanahr
    November 4, 2012 at 12:02 pm
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    this is good and basic! and if you dont like the music, i know its reallll hard to click the mute button ya fools

  5. naturenut1967
    November 4, 2012 at 12:12 pm
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    I like this video, well explained, now I can finish my homework and hopefully pass my test.

  6. BarneyEire0900
    November 4, 2012 at 12:31 pm
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    Ah yea to be fair,it would be 😀

  7. BarneyEire0900
    November 4, 2012 at 12:36 pm
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    It was a stupid comment an what was more disturbing was the fact you agrred with it…have you ever heard of volume control

  8. vikingmetal99
    November 4, 2012 at 1:08 pm
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    i have a test tomorrow and you totally saved my life

  9. Lexzly
    November 4, 2012 at 1:12 pm
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    good

  10. oi12oi90
    November 4, 2012 at 1:53 pm
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    the music is so distracing

  11. SamuelHammer
    November 4, 2012 at 2:02 pm
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    Excellent, clear cut and understandable. Your students would applaud you, not least for the original music. Well done.

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