Tuesday, December 7, 2010

Neurons & Neurotransmitters

Today we learned about the structure of a neuron as well as the basics of how chemical and electrical signals are transmitted from one neuron to the next. To test your understanding on how neurons send signals, complete cases A and D in the animation below. Write the completed correct sentences down and bring them to class. Click the picture below to link to the activity.

What is Dopamine?

Caption: Dopamine neurotransmitter, molecular model. Dopamine is a chemical released by the brain as a neurotransmitter and a hormone. It has been intensively studied as it plays a crucial role in the brain's reward and pleasure pathways. It is released when a pleasurable new stimulus is encountered, and directs the brain to find more of the stimulus. For this reason it plays a significant role in addiction, not only to drugs that release or mimic dopamine (such as cocaine) but also to gambling and other social addictions. Lack of dopamine is linked to numerous disorders, such as Parkinson's disease, depression and schizophrenia. In this model atoms are shown as balls and are colour coded: carbon (grey), oxygen (red), nitrogen (blue) and hydrogen (white). Information from The Science Photo Library

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