N is for Nerves

Nerves are responsible for transmitting information from the various parts of the body (what we feel as sensations, for example heat or pain) to the brain, in order for an appropriate action to occur. For example, if you hold a very hot object there are signals sent towards your brain to warn you of the potential danger. The reaction might be that you’ll retract your hand to prevent it from being burnt. With this type of reaction the signal may not actually reach the brain, instead automatic responses deal with the situation very quickly – the system is designed this … Continue reading