Sperm
Mike and Zeron find out how to keep their sperm in tip-top shape, make plaster casts of their testicles and take part in the world's first on-screen sperm race in able-bodied semen.
Related programme
At some point, we all get scared. But why, and how? Dr Mike Leahy and Dr Bundy Mackintosh discuss the science behind fear
So what is fear and why do we react that way?
I hope you've now got a better idea how your body and brain both perceive, and react to, fear. If you are interested in finding out more, why not see what courses the Open University offers. Even if you've done no biology before, a foundation course will really open your eyes to what is going on around you in the natural world, and how our bodies work.
References that won't scare you…
• 'The Expression of the Emotions in Man and Animals' (Charles Darwin, 1872)
• 'Fear and the Amygdala'
• 'Imaging Emotion in the Brain'
To learn more about the amygdala, which is a complex subject, check out the Changing Minds* website.
* The BBC is not responsible for the content of external internet sites.
See also…
• Cannon, WB (1927). 'The James-Lange theory of emotions'. American Journal of Psychology, 39:115-124.
• Rolls, ET (1999).'The Brain and Emotion'. Oxford University Press.
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Content last updated: 25/08/2005
About our expert
Dr Bundy Mackintosh is a Lecturer in Psychology at the Open University. Bundy moved to the OU in 2001, having worked for the previous 5 years in Cambridge at the Medical Research Council's Cognition and Brain Sciences Unit.
Bundy's research areas include Cognition and Emotion, especially the cognitive process involved in anxiety.
