active transport is when cells must move materials in an opposite direction against concentration gradient. it requires energy.
passive doesn't require energy.
like a balloon , when u blow it up it requires energy and when u left the air go out it doesn't.
Active transport requires energy while passive transport does not.
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Some are passive (e.g. melanin) and some are active (e.g. actin, myosin).
Osmosis is an example of Passive Transport.
Active transport requires energy while passive transport does not.
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Passive transport is the movement of molecules through cell membranes with out the use of energy by the cell
Diffusion, Osmosis, and facilitated diffusion.
Active transport requires energy (ATP, GTP, etc) to work against the electrochemical gradient. Passive transport works with the electrochemical gradient and does not require energy. (Think diffusion)
The most basic difference between active and passive transport is that active requires energy while passive does not. You would require active transport if the substance is going against the concentration of molecules inside and outside of the membrane or if the substance is particularly large. Passive is more for smaller molecules that go with the concentration of the molecules inside and outside of the membrane.
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active and passive
In passive transport the solute is driven across the cell until both sides of the membrane are equal. In active transport, energy causes the transporter to release the solute to only one side of the membrane.
== == "English grammer active and passive voice change from active to passive .
is a thermocouple an active or passive transducer?-why?