The Biology of the Mind
The Biology of the Mind PSYC 2010 - 001
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This 1 page Class Notes was uploaded by Myrissa Webb on Wednesday August 31, 2016. The Class Notes belongs to PSYC 2010 - 001 at Auburn University taught by Jennifer Daniels in Fall 2016. Since its upload, it has received 4 views.
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Date Created: 08/31/16
The Biology of the Mind Neural communications The body's information system is built from billions of interconnected cells Neurobiologists and other investigators understand that humans and animals operate similarly when processing info Neuron A nerve cell, or neuron, consists of many different parts Dendrites- Branching extensions at the cell body. Receive messages from other cells Axons- Passes messages away from the cell body to other neurons, muscles, and glands Terminal Branches: Form junctions with other cells Neural Impulse: (Action Potential) Electrical signals traveling Cell body: The cells life-support system of the neuron. Contains the nucleus, metabolic and reproductive functions for the cells. DNA is stored here Action Potential A neural impulse. A brief electrical charge that travels down the axon and is generated by the movement of positively charged atoms in and out of channels in the axon's membrane Threshold of Excitation Threshold: Each neuron receives excitation and inhibitory signals from many neurons. When the excitatory signals minus the inhibitory signals exceeds a minimum intensity (threshold) the neurons from action potential Action Potential Properties All-or-none response: A strong stimulus can trigger more neurons to fire and to fire more often, but it does not affect the action potentials strength or speed. Intensity of an action potential remains the same throughout the length of the axon Synapse A junction between the axon tip of the sending neurons and the dendrite or cell body of the racking neuron This tiny gap is called the synaptic gap or cleft Neurotransmitters This (chemical) released from the sending neuron travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing it to generate an action potential Reuptake Neurotransmitters in the synapse are reabsorbed into the sending neurons through the process of reuptake. This process applies the brakes on neurotransmitter actions How Neurotransmitters influence us Serotonin path ways are in evolved with mood regulating Dopamine pathway are involved with disease such as schizophrenia and Parkinson's disease
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