Spec Ref Topic Studied Revised Confident
Surface area to volume ratio
3.3.1 I can describe the relationship between the size
of an organism and its SA:V ratio
3.3.1 I can describe how adaptations of different
organisms change this ratio and its benefits
3.3.1 I can define key words for this topic
N/A I have read beyond the specification on this topic
Gas exchange
3.3.2 I can describe how single celled organisms
exchange substances
3.3.2 I can describe how the tracheal system of an
insect provides sufficient gas exchange
3.3.2 I can describe how the counter current system in
fish provides sufficient gas exchange
3.3.2 I can describe how the structure of xerophytic
plants prevents water loss
3.3.2 I can describe how gas is exchanged in
dicotyledonous plants
3.3.2 I can describe the gross structure of the human
gas exchange system
3.3.2 I can describe the features of the alveolus as a
surface for gas exchange
3.3.2 I can describe the mechanisms of inspiration and
expiration and pressure changes
3.3.2 I can describe how gas exchange occurs at the
alveoli
3.3.2 I can interpret data related to factors causing
lung disease
3.3.2 I can explain different measures of lung function
and their significance in diagnosis of lung disease
3.3.2 I can define key words for this topic
N/A I have read beyond the specification on this topic
Digestion and absorption
3.3.3 I can define digestion and absorption
3.3.3 I can describe how carbohydrates are digested
3.3.3 I can describe how lipids are digested
3.3.3 I can describe how proteins are digested
3.3.3 I can explain the use of co-transport in the
absorption of amino acids and monosaccharides
3.3.3 I can describe the role of micelles in lipid
absorption
3.3.3 I can define key words for this topic
N/A I have read beyond the specification on this topic
Mass transport in animals
3.3.4.1 I can describe the structure of haemoglobin
3.3.4.1 I can explain how loading and unloading of
oxygen allows for transport in the blood
3.3.4.1 I can use cooperative binding to explain the
sigmoidal dissociation curve
AQA A Level Biology Revision Checklist Topic 3-Exchange systems