Lecture 32

Lecture 32 - Lecture 32 11:44:00 AM Neurons have 4 basic...

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Lecture 32 28/11/2007 11:44:00 Neurons have 4 basic components Cell body – contains the nucles and most organelles o Integrates and relays information from the dendrites to the axons Dendrites – projections associated with the cell body which receive inputs  from the environment or other neurons Axon – long cytoplasmic extension projecting away from the cell body o It is down the axon that the nerve sends its message to the next cell Axon terminal – occur at the end of the axon o Specialized region of the cell where the neuron passes its signal onto  the next cell in the circuit o The next cell may be another nerve, or muscle, or a gland Varying nerves Sensory nerves o Collect and relay information about the environment from the  periphery. Includes information about smell, taste, touch, sight, sound,  temperature and pain Motor Neurons o Are the effector nerves Pass information on to a target They tell a muscle to contract, they might alter the rate of  the heart beat, they may stimulate an endocrine gland to  secrete a hormone Interneurons o Integrate the neuronal machinery between sensory and motor neurons
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This note was uploaded on 05/26/2008 for the course MCDB 120 taught by Professor Johncarlsoncarolbascom-slackfrankslack during the Fall '07 term at Yale.

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Lecture 32 - Lecture 32 11:44:00 AM Neurons have 4 basic...

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