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Chapter 3 Notes

by: Payton Chance

Chapter 3 Notes PSYC 1010

Payton Chance
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About this Document

Biological Foundations of Behavior
Elements of Psychology
Jenel Cavazos
Class Notes




Popular in Elements of Psychology

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This 1 page Class Notes was uploaded by Payton Chance on Saturday January 30, 2016. The Class Notes belongs to PSYC 1010 at University of Oklahoma taught by Jenel Cavazos in Summer 2015. Since its upload, it has received 15 views. For similar materials see Elements of Psychology in Psychlogy at University of Oklahoma.


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Date Created: 01/30/16
Psychology Chapter 3: Biological Foundations of Behavior THE NERVOUS SYSTEM: - Pathways in the nervous system: - Afferent nerves (sensory nerves): carry messages TO the brain and spinal cord. Ex: touch hot stove, afferent nerves are sending signals to the brain saying “Its hot!!” - Efferent nerves (motor nerves): carry messages FROM the brain and spinal cord Ex: the brain sends the signal through the efferent nerves to make you move your hand off the hot stove. - Neural networks: networks of nerve cells that integrate sensory and motor nerves Ex: You are listening to a lecture when the bell rings in the hallway. In order to hear this stimulus, ______ neurons must carry electrochemical messages from your ears to your brain. — Answer: afferent DIVISIONS OF THE NERVOUS SYSTEM: Central Nervous System (CNS): - brain and spinal chord Peripheral Nervous System (PNS): - Network of long nerves - Two divisions of PNS: - Somatic division: voluntary - Autonomic division: automatic Ex: breathing - Two divisions of Autonomic: - Sympathetic: arousal (heart rate rises, breathing gets faster) - Parasympathetic: calming (heart rate slows, breathing slows) NEURONS: Neurons: nerve cells that process information and allow communication throughout the body - Dendrites: receive messages from all the neurons around them. (branches out of the neuron) - Axon: the long body of the neuron. It can vary in length. - Myelin Sheath: protein and fat that insulates the axon itself so the electrical signals can get where they need to go. Without this, messages get mixed up. Ex: in MS, the myelin sheath starts to deteriorate and the messages get crossed. - Terminal Buttons: the message leaves the neuron and goes to the next neuron that is waiting.


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