neurons and neurotransmitters by diana last modified by: ashley heather brock last modified by...
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Receive, integrate, and transmit information Operate through electrical impulses Communicate with other neurons through chemical signals NeuronsTRANSCRIPT
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Neurons and Neurotransmitters
by Diana Last modified by: Ashley Heather Brock last Modified by Angela Sagner
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The Nervous System• A physical organ system like any other
• The main kind of cell we are studying today:– Neuronswhich are the basic units of the nervous system.
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Receive, integrate, and transmit information
Operate through electrical impulses
Communicate with other neurons through chemical signals
Neurons
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T
The Withdrawal Reflex
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Neuron Anatomy and Neural Communication
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Neural Anatomy Dendrite
the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body
Axon the extension of a neuron, ending in
branching terminal fibers, through which messages are sent to other neurons or to muscles or glands
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Neural Anatomy and communication
Synapse junction between the axon tip of the sending
neuron and the dendrite or cell body of the receiving neuron
Cell Body-main body connected to dentrites and axon
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Specific Parts: The NeuronStructure
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Specific Parts: The Neuron Function
Neurons = 3 functions: Reception, Conduction, Transmission
1.3.
2.
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ACTION POTENTIAL VIDEO
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Relay Race
Action Potential starts at the dendrite, travels through the cell body, down the Axon to the Axon Terminals.
• How does it get to the next cell’s dendrites?
Neurons don’t touchThe Synapse has a millionth inch gap.In the synapse there are vesicles w/
neurotransmitters that are chemical messengers that transmit info to the next dendrite.
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How does it get to the next cell’s dendrites?
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Neurotransmitters
chemical messengers that traverse the synaptic gaps between neurons
when released by the sending neuron, neurotransmitters travel across the
synapse and bind to receptor sites on the receiving neuron, thereby influencing whether it will generate a neural impulse
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Myelin Sheath– Fatty material – Insulates the axon– Allows for rapid movement of
electrical impulses along the axon– The Nodes of Ranvier are gaps in the
myelin sheath where action potentials are transmitted.