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Circadian Rhythms: Keeping Time

The learning resources presented in these web pages explore the human biological clock and recent research on the effect of general anaesthetics on the functioning of this clock.

About the Learning Resources


These resources look at the concept of biological clocks and the genetic basis for these clocks. Animal and plant behaviour is often linked to information from the biotic and abiotic environment. Biological clocks control the rhythmic behaviour of plants and animals. Biological clocks evolved to coordinate the activities of living things with the geophysical cycles occurring in the world around us. Scientists have long been fascinated by how biological clocks work and their genetic basis. 

Resource Links

Panic Time

What are Circadian Rhythms?

A page for teachers and senior students summarising the key concepts associated with circadian rhythms. 



Understanding Circadian Rhythms: Case Study

Read this case study to learn about the effect of anaesthetics on the human biological clock. 



Discussion Questions

Resource questions designed to further discussion on the topic of circadian rhythms.


Question and Answer

Challenge Questions

Further questions on the subject of circadian rhythms designed to stimulate more in-depth conversation and learning.



Seminar Recording

An in-stream version of the seminar series the resources on these web pages originate from.



Seminar Paper

Download the seminar paper.



Links to Curriculum and Assessment of Learning

Information for teachers on how these resources link to current curriculum objectives.



Further Resources

Additional resources for teachers to further understand the resources presented in these web pages.