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compare and contrast the following types of cellular transport   Diffusion  ...

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nadaazer | Student, Undergraduate | eNoter

Posted April 22, 2013 at 2:38 PM via web

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compare and contrast the following types of cellular transport

 

Diffusion

 

Facilitated diffusion

 

Osmosis

 

Active transport

 

Definition

 

 

 

 

 

Is energy in the form of ATP required

 

 

 

 

 

Are materials moving from an area of higher concentration to an area of lower concentration

 

 

 

 

 

Are protein carriers or channels involved

 

 

 

 

 

Example of substance that uses this type of transport.

 

 

 

 

 

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orchid101 | College Teacher | (Level 1) Associate Educator

Posted April 26, 2013 at 1:01 PM (Answer #1)

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Osmosis is the net diffusion of water from a weak solution to the more concentrated solution when the two are separated by means of a semi permeable membrane.

Diffusion is, therefore, the movement of molecules or ions of a solute or a solvent, be it a solid, liquid or gas from the region of its higher concentration to that of its lower concentration.

Active transport usually occurs across the protoplasmic membrane (i.e., plasma membrane, tonoplast, etc.). Active transport is not spontaneous and does not proceed towards an equilibrium. The devine force for active absorption is energy derived from metabolic processes.

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