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What is net movement?

What does 'no net movement' mean?

  • Just a 2 mark definition needed. It's supposed to be really simple but I can't find anything on Google about the 'No net movement' term.

  • Answer:

    When a cell is placed in an isotonic solution, water molecules are moving both into the cell and out of the cell at the same rate. So, while individual water molecules are crossing the membrane, there is no net movement of water, in that the concentration of water inside and outside of the cell remains constant. No net movement describes the dynamic equilibrium in which the rate of movement in one direction is equal to the rate of movement in the other direction.

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If something moves one metre to the left, then one metre to the right, it has had a net movement of zero, it's back where it started. Net generally refers to an average over a long time. Bear in mind travelling backwards is considered to have a negative distance EDIT you're going to need to give me some context then

In biology, no net movement usually refers to movement of ions, water etc. across a barrier. Things may be in flux, that is, there may be movements across the barrier, but it may be to and fro ultimately leading to no overall change in concentration on either side.

Ishan26

It means that some of the substance may still move between the barrier, but overall, there is no change (say, 5 mL might move from the left side to the right side, but then 5mL moves from the right side to the left side) I hope this information was very helpful.

ajedrez

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