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Answered 2008-10-02 03:44:16

Cell membranes are most permeable to non-polar molecules(eg. lipids and cholesterol). Polar molecules can also cross the membrane but require specific transporters, carriers,or channels(eg. sodium, potassium, chlorine, calcium, magnesium, glucose, amino acids, etc...).

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What is process by which materials enter and leave a cell through the cell membrane?

The correct answer is diffusion. Diffusion is the process by which materials enter and leave a cell through the cell membrane.


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The movement of water and dissolved materials through a cell membrane is called Osmosis.


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What you are considering when you are referring to how easily materials can pass through a membrane is how permeable the cell wall or membrane is.


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Materials exit a cell by active transport by passing through the cell membrane. The membrane is usually semi-permeable which makes it easy to release materials.


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Passive transport does not use energy to pass through a cell membrane. active transport uses energy to pass through a cell membrane.


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The cell membrane is the border allowing entry and exit of materials through the cell. Both animal and plant cells have one.


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