Chapter 6 / 6 short lessons
Respiration in humans
Connect breathing and gas exchange to energy release in cells, including exercise and recovery.
G3 Pure Biology / K325 / 2027 syllabus
What do you think?
A runner stops, but keeps breathing quickly. What still needs explaining?
Lessons
0 of 6 marked as readFollow air into the lungs
Identify the airway structures, exchange surfaces and the role of cilia.
About 4 minHow breathing moves air
Explain inhalation and expiration through muscle action, chest volume and air pressure.
About 5 minExchange gases at an alveolus
Link alveolar structure and blood supply to efficient diffusion.
About 5 minLink smoke components to effects
Explain the major biological effects of the three named tobacco-smoke components.
About 4 minAerobic respiration releases energy
Define aerobic respiration and use its word and balanced symbol equations.
About 5 minAnaerobic respiration and recovery
Explain anaerobic energy release, lactic acid and repayment of an oxygen debt.
About 5 minWhat you will be able to do
- Trace air to the exchange surface.
- Explain ventilation using muscles, volume and pressure.
- Connect alveolar structure to diffusion.
- Use respiration equations and explain recovery after exercise.
Spaced review
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