Biopsych - Lecture 1

Biopsych - Lecture 1 - BioPsych 15:28 o Neurons: signals o...

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BioPsych 15:28 Cells of the Nervous System o Neurons: specialized cells that are capable of sending and receiving chemical  signals There are different structural classes o Multipolar: motor neurons; “projection neurons in brain o Unipolar: sensory neurons o Bipolar: sensory neurons o Interneurons: in spinal cord and brain “Polarity” refers to the number of processes (out-growths) coming from  the cell body (refers to dendrites and axon) 100 billion neurons in the brain Only 10% of the total number of cells that make up our brain – the rest of the  brain is non-neuronal Neurons have a cell membrane o “Lipid Bilayer”: 2 layers of fat molecules o Proteins (receptors, channels, transporters) span the membrane,  communicating from the outside of the cell to the inside o Parts of a neuron: There are different types of neurons, but most have 4 main parts o Dendrite: receives information from other neurons Extend from the cell body (one type of “process”) Receptors (specialized proteins) for different neurotransmitters Branched to receive lots of input from different neurons Where chemical information from the environment is detected and  converted to electrical information Send information to the ell body where it is integrated
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This note was uploaded on 11/07/2010 for the course PSY PSY 3 taught by Professor Szulinski during the Spring '09 term at UCSB.

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Biopsych - Lecture 1 - BioPsych 15:28 o Neurons: signals o...

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