Moltenmo
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Someone help me! This makes no sense whatsoever. If mineral ions are found in very dilute solutions (with high concentration of water and low concentration of sugar), which are absorbed by plants (which are less dilute), how is this active transport and not diffusion?

Someone clear this confusion please!!!!

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Eehaj
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Basically, the root contains more minerals than the soil but it still needs more minerals from the soil so it takes it up by active transport. The water will be uptaken by osmosis


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2384911
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(Original post by Moltenmo)
Someone help me! This makes no sense whatsoever. If mineral ions are found in very dilute solutions (with high concentration of water and low concentration of sugar), which are absorbed by plants (which are less dilute), how is this active transport and not diffusion?

Someone clear this confusion please!!!!

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The concentration of ions in the soil is lower than the concentration of ions in the plants.
or
The concentration of ions in the plant is higher than the concentration of ions in the soil.

Therefore, ions move from the soil into the plant against a concentration gradient.
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ax12
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The gradient is from the plant to the soil, so to take up the nutrients the plant must actively move them up the concentration gradient, the opposite way to simple diffusion.
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emduck
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(Original post by Moltenmo)
Someone help me! This makes no sense whatsoever. If mineral ions are found in very dilute solutions (with high concentration of water and low concentration of sugar), which are absorbed by plants (which are less dilute), how is this active transport and not diffusion?

Someone clear this confusion please!!!!

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Diffusion occurs from where there is a high concentration of something to a low concentration of something following a concentration gradient. In the case you mentioned there is a low concentration of mineral ions and they are absorbed by a plant which has a higher concentration of mineral ions, this cannot occur by diffusion as it goes against the concentration gradient. Therefore active transport must occur as the plant has to work to move the minerals across.

I think this is right.
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Reality Check
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(Original post by emduck)
Diffusion occurs from where there is a high concentration of something to a low concentration of something following a concentration gradient. In the case you mentioned there is a low concentration of mineral ions and they are absorbed by a plant which has a higher concentration of mineral ions, this cannot occur by diffusion as it goes against the concentration gradient. Therefore active transport must occur as the plant has to work to move the minerals across.

I think this is right.
Spot on Energy is required to move ions against a concentration gradient, and this is why active, rather than passive transport is required.
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Moltenmo
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(Original post by AshEntropy)
The concentration of ions in the soil is lower than the concentration of ions in the plants.
or
The concentration of ions in the plant is higher than the concentration of ions in the soil.

Therefore, ions move from the soil into the plant against a concentration gradient.
Thank you! I just wasn't sure whether the concentration of ions in the soil was greater or less than the concentration of ions in the plant.

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Moltenmo
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Thank you everyone! The power of a clickbait title lol!

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2384911
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(Original post by Moltenmo)
Thank you! I just wasn't sure whether the concentration of ions in the soil was greater or less than the concentration of ions in the plant.

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No problemo friendo
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