plasma is a solution, cytoplasm is a colloid and blood is a suspension. Explain how the properties of solutions, colloids and suspensions adapt these biological materials to carry out their functions in the body?

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am doing edexcel a level bio.
pls helpout.

Posted Sun 27th May, 2012 @ 07:08 by Musllih

1 Answer

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A solution is a mixture that has very small particles that cannot be seen.

A colloid are well mixed mixtures with slightly larger particles. Particles are too large to form a solution but do not settle into layers if left standing and cannot be filtered by physical means.

A suspension is a mixture with noticeable different particles, but they are small enough to appear evenly distributed. If left standing, the particles will separate. 

In other words, plasma is a solution because it is made up of only one substance, and these cannot be seen or separated by physical means. Blood is a suspension because it is made up of several different components which can be seen and separated by physical means (plasma, cells, etc..) and if left standing, will separate.

Answered Sun 27th May, 2012 @ 11:45 by LP-FTW