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13 Cards in this Set
- Front
- Back
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What is diffusion? |
It is the movement of particles from a high concentration to an area of low concentration. |
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What molecules cannot diffuse in cell membranes? |
Large molecules such as starch or proteins cannot diffuse through cell membranes. |
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What is active uptake? |
The process of allowing the plant to absorb minerals against the concentration gradient. |
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What does active intake need to work? |
It needs energy from the plants to work. |
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What significant plant process does diffusion play a part in? |
In photosynthesis. |
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What is osmosis? |
The movement of water molecules across a partially permeable membrane from a region of high water concentration to an area of low concentration. |
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What is a partially permeable membrane? |
Membrance with microscopic holes, where only water molecules can pass through. |
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What happens to plant cells placed in hypotonic (low-concentration) solutions? |
It expands, the cell wall prevents it from bursting, and the cell becomes turgid (swollen) |
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What happens to animal cells placed in hypotonic (low-concentration) solutions? |
They expand because water from the outside will enter the cell because of osmosis. |
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What happens to plant cells placed in a hypertonic (high-concentrated) solution? |
The water moves out of the cell causing the cell to shrink becoming flaccid. |
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What happens to animal cells placed in a hypertonic (high-concentrated) solution? |
Water would exit the cell causing the cell to shrink and die. |
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Name examples of diffusion happening. |
Smells in the air. |
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Name examples of osmosis happening. |
Plants taking water and mineral from roots. |
