AQA A-Level New specification - 3.3.2 Gas exchange in Humans -TWO lessons!

AQA A-Level New specification - 3.3.2 Gas exchange in Humans

These lesson cover the following spec points;

3.3.2 Gas exchange

The gross structure of the human gas exchange system limited to
the alveoli, bronchioles, bronchi, trachea and lungs.
The essential features of the alveolar epithelium as a surface over
which gas exchange takes place.
Ventilation and the exchange of gases in the lungs. The
mechanism of breathing to include the role of the diaphragm and
the antagonistic interaction between the external and internal
intercostal muscles in bringing about pressure changes in the
thoracic cavity.
Students should be able to:
• interpret information relating to the effects of lung disease on
gas exchange and/or ventilation
• interpret data relating to the effects of pollution and smoking
on the incidence of lung disease
• analyse and interpret data associated with specific risk
factors and the incidence of lung disease
• evaluate the way in which experimental data led to statutory
restrictions on the sources of risk factors
• recognise correlations and causal relationships.

MS 2.2
Students could be given
values of pulmonary
ventilation rate (PVR) and
one other measure,
requiring them to change the
subject of the equation:
PV R = tidal volume
× breathing rate