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How is active transport different from facilitated diffusion?
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6. The Membrane
Passive vs. Active Transport
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Does passive transport require energy?
A
Yes, it requires energy in the form of heat.
B
No, it only requires energy when moving against a gradient.
C
No, it does not require energy.
D
Yes, it requires ATP to function.
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Understand the concept of passive transport: Passive transport is the movement of molecules across a cell membrane without the use of energy by the cell.
Identify the types of passive transport: Common types include diffusion, osmosis, and facilitated diffusion.
Recognize the role of concentration gradients: Passive transport relies on the natural movement of molecules from areas of higher concentration to areas of lower concentration, following the concentration gradient.
Clarify the energy requirement: Since passive transport follows the concentration gradient, it does not require energy input from the cell, such as ATP.
Compare with active transport: Active transport requires energy because it moves molecules against their concentration gradient, which is not the case for passive transport.
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