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PSY_200_Test_1_Guide_4 - Peripheral Nervous System The...

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Biological Psychology The nervous system is composed of two types of cells: Glia and Neurons. Glia (or Glial): 1. Insulate neurons 2. Synchronize activity among neighboring neurons 3. Remove waste products Neurons: Cells of the nervous system that receive information and transmit it to other cells by conducting electrochemical impulses. Major Types of Neurons: 1. Interneurons 2. Sensory neurons 3. Motor neurons Neurons communicate electrically within neurons. Neurons communicate chemically between neurons. Neurotransmitters: Chemicals that are stored in the terminal of an axon and that, when released, activate receptors of other neurons. Which Neurotransmitters Play A Role In: Alzheimer’s: Acetylcholine Depression: Serotonin Parkinson’s: Dopamine Endorphins: Neurotransmitters that weaken pain sensations. Endorphins are released when there is pain or during a pleasant experience such as sexual activity or thrilling music. The two major branches of the nervous system are the Peripheral and the Central Nervous System.
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Unformatted text preview: Peripheral Nervous System: The peripheral nervous system contains the nerves, which provide a means of communication between the central nervous system (the brain and spinal cord) and the sensory organs, skeletal muscles, and internal body organs. Somatic Nervous System: Part associated with the voluntary control of body movements, and the reception of external stimuli (eg. touch, hearing, and sight).\ Autonomic Nervous System: Part closely associated with spinal cord, and controls the internal organs such as the heart. Sympathetic Nervous System: Controlled by cells lying just outside the spinal cord, prepares the body for brief bouts of vigorous activity. Parasympathetic Nervous System: Controlled by cells at the top and bottom of the spinal cord, promotes nonemergency functions. Central Nervous System: The central nervous system contains the brain and the spinal cord....
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