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How can a membrane push fluid against a pressure gradient?

How can a membrane push fluid against a pressure gradient?

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Answer #1

The membrane pushes a fluid against a concentration gradient by a force known as 'hydrostatic pressure', which is the pressure exerted by a fluid due to the force of gravity. The process of moving fluid towards through a cell membrane is known as 'filtration' and and while the processes of diffusion and osmosis depends on concentration gradient but, filtration depends on the pressure gradient. With the hydrostatic pressure, small molecules can pass through the membrane against a concentration gradient.

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