Q:

What is an example of passive transport?

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Quick Answer

Osmosis is an example of passive transport. Osmosis is the diffusion of water across a membrane from an area of high concentration to an area of low concentration.

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Passive transport does not require the input of energy. Materials are always transferred from areas of high concentration to areas of lower concentration. It can be done either by diffusion of small, non-polar molecules through a semi-permeable membrane or by transport through a channel.

Osmosis is very important in biological processes and systems. Water is able to enter cells and tissues by passing through the membrane from an area of higher concentration to an area of lower concentration. If ions are not removed from a cell to maintain even concentrations within and outside the cell, water rushes into the cell through osmosis, causing the cell to burst.

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Related Questions

  • Q:

    What are some examples of active and passive transport?

    A:

    Some examples of active transport are endocytosis, exocytosis and the use of a cell membrane pump; diffusion, osmosis and facilitated diffusion are all examples of passive transport. In active transport, particles move from areas of low concentration to high concentration, while in passive transport, the particles move from areas of high concentration to areas of low concentration.

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  • Q:

    What is the simplest type of passive transport?

    A:

    The simplest type of passive transport is diffusion or simple diffusion. Osmosis, which is also a form of passive transport, is similar to diffusion in that both move a substance from an area of high concentration to an area of low concentration.

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  • Q:

    What are the two types of passive transport?

    A:

    The two types of passive transport are diffusion and osmosis. Diffusion is the movement of molecules across a membrane from an area of high concentration to an area of low concentration, occurring with or without the help of membrane proteins. Osmosis is the diffusion of water molecules.

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  • Q:

    How is active transport different from passive transport?

    A:

    Active transport is different from passive transport in that during active transport, molecules move against the concentration gradient, which means they move from a low-concentration area to a high-concentration area. On the other hand, passive transport moves with the concentration gradient.

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