Chapter 2 Q - Chapter 2 : Biological foundations of...

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Chapter 2 : Biological foundations of Behavior Neurons are the basic building blocks of the nervous system Physiological basis for psychological processes
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Parts of the Neuron Soma: Cell Body Axon: trunk like cable Dendrites: tree like extensions
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Additional Parts Terminal Buttons: knoblike swellings at end of axon Myelin Sheath: fatty material covering axon Nodes of Ranvier:
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3 types of neurons Sensory neurons Carry outside info from outside world to spinal cord and brain Sensory receptors Motor Neurons Messages from brain and spinal cord to muscles Glands to release hormones Interneurons Most common Neurons to neurons
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How do Nerves Communicate? Action Potentials When neuron at rest or resting potential Slightly negative charge (-70 millivolts) Ions inside and outside of cell that move through gates in cell membrane Positive ions outside Cell holds potential energy that can be used to generate (fire) an action potential when stimulated to threshold
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This note was uploaded on 09/13/2011 for the course PSYCH 101 taught by Professor Smith during the Spring '11 term at Community College of Philadelphia.

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Chapter 2 Q - Chapter 2 : Biological foundations of...

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