Biology

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Created by: Andrew Stevenson
Created on: 14-12-12 12:58

How does water move from inside the cell to the outside?

Osmosis

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What form is the energy in active transport?

ATP

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Using the theory of water potential, explain why water moves in and out of a cell, and how does this affect the cell?

Water moves from an area of less negative water potential to and area of more negative water potential, if water is moved out the cell the size of that cell decreases, and if it moves in to the cell the size of the cell increases.

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What is the difference between facilitated diffusion and basic diffusion?

Basic diffusion involves basic molecules / molecules in basic diffusion go straight through the phospholipid bilayer / facilitated diffusion uses 'protien pumps' or 'carrier protiens' to push moleculess through the membrane

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What is the formula for rate of diffusion?

(surface area X difference in conentration) / (length of diffusion path)

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In basic diffusion, where do the molecules tend to move to?

To an area of high concentration to an area of low concentration

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