cell biology

water may move across cell membranes via

osmosis

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osmosis....

is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane

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what is teh concentration of dilute solutions

high concentration of water

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concentrated solutions contain a ...

low concentration of water

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do partially permeable membranes allow all molecules to pass through

no only some

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does the cytoplasm of cells contain a relatively low concentration of water

yes

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too much water moving into the cell will cause...

cell to expand and burst

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if animal cell is place in a very concentrated solution .....

water will move out and the cell will shrink

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in plant cells when theres too much water...

the plant cell swells and does not burst due to the cell walls. this is called turgid

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if theres less water then...

plant cell will shrink and this is called flaccid

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active transport is...

it moves substances from a more dilute solution to a more concentrated solution against a concentration gradient. this requires energy from respiration

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give benefits of active transport

allows mineral ions to be absorbed into plant root hairs from very dilute solutions in soil. plants require ions for healthy growth. it also allows sugar moleecules to be absorbed from lower concentrations in gut into blood which has higher sugar con

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are sugar molecules used for cell respiration

yes

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cell biology

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