AQA Extension Biology B3

AQA, A lot of definitions taken from the revision guides. 

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  • Created by: Tom
  • Created on: 15-06-11 17:00


The passing of a water down a concentration gradient (high to low), through a partially permeable membrane. 

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The passing of a liquid or gas down a concentration gradient. 

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Active transport

The movement of a substance against the concentration gradient (low to high) using energy from respiration. 

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Tiny moist air sacs in the lungs with a large surface area and a rich blood supply which maintain a concentration gradient in both directions.

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Photosynthesis Equation

Carbon Dioxide + Water + Energy --> Glucose + Oxygen

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