THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What do the following terms have in common?-diffusion-osmosis-facilitated diffusion
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They require energy to move materials
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They move from a low concentration to a high concentration
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They move move materials DOWN the concentration gradient
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They require ATP
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Explanation:
Detailed explanation-1: -The common feature shared both by simple diffusion and facilitated diffusion is. both require energy for the transport of substances.
Detailed explanation-2: -All three types of diffusion are forms of passive transport, and therefore don’t require energy.
Detailed explanation-3: -Simple diffusion – movement of small or lipophilic molecules (e.g. O2, CO2, etc.) Osmosis – movement of water molecules (dependent on solute concentrations) Facilitated diffusion – movement of large or charged molecules via membrane proteins (e.g. ions, sucrose, etc.)
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