TRANSPORT much confusion

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uhna
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TRANSPORT much confusion

Post by uhna » Tue Jun 03, 2008 9:42 pm

I am really confused by something very simple, i need to summarise transport mechanisms of the cell, ie active and passive transport but keep getting different names from everywhere, are the four main groups;
facilitated diffusion
passive transport
facilitated transport
active transport

and if so what is the difference between simple diffusion and passive transport?
also is there such a term as passive diffusion or active diffusion??? very confused! :!: :?: :?:

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mith
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Post by mith » Wed Jun 04, 2008 2:18 am

they are different, look them up.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

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MrMistery
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Post by MrMistery » Wed Jun 04, 2008 4:35 pm

Passive transport means no ATP is required for the reaction, and the substance flows down its chemical(or electrochemical, for charged substances) gradient. This can be either simple or facilitated diffusion.
As for your later question, i'll give you a hint: diffusion in biology is practically the same as diffusion in physics. Look it up.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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