PSYCH 1010 1st Edition Lecture 8Outline of Last Lecture 2/2I. Origins of biological psychologya. Biological psychologyb. Historical origins of the neurosciencesII. Basic strategy: divide and conquera. AmygdalaIII. Eliminative reductionisma. Reductionismb. Eliminative reductionism and cellsc. “factory metaphor” Outline of Current Lecture 2/4I. Neurons as Information Unitsa. Brain and blood supplyb. Glial cellsII. Neuronsa. receive, process, and transmit informationb. electrical eventIII. Three potentialsa. Resting Potential (neither sending nor receiving)b. Grade potential (receives)c. Action Potential (sends)d. structureCurrent Lecture 2/4I. Neurons as Information units. Neurons are information units that receive, process, and transmit information. a. On average, 2% of body weight is made up of brain tissue. 20% of the circulating blood supply is made available to the brain. This means that the brain is very important and needs a lot of blood supply. b. Glial cells are support structures in the brain that hold things together. Glial derives from the Greek word meaning glue. Eliminative reductionists believe that Glial cells are the most important. II. Neuronsa. A neuron is an information unit. Like any other information unit (a radio, TV, computer), it must receive, process, and transmit information.b. The information within a neuron is an electrical event. Electricity in the nervous system is not the same as the electricity in a wall socket. It is charged particles floating in water. These charged particles are called ions. An ion is an atom or molecule that has gained or lost an electron. III. Three Potentialsa. Resting potential of a neuron is the electric charge what a neuron is neither sending nor receiving a message. b. The Grade potential is when the neuron is receiving information. c. The Action potential is the electric charge when a neuron is sending a message. The axon transmits information axon hillock (English word meaning little hill). d. The dendrites receive information and the Soma processes information. A neuron always has one axon ad can have thousands of dendrites receiving