Neurons Flashcards
Neurons
Nerve cells that conduct electrical impulses and relay info through body
All neurons contain…
Dendrites, cell body, and axon
Neuron cell body…
Synthesizes all nerve cell products, large nuceli with no centrioles
Dendrites…
Receive info from other neurons and send impulses to cell body
Axon…
Conducts nerve impulses AWAY to axon terminals
Neurotransmitters
Chemicals stored in secretory vesicles (axon terminal vesicles)
Synapse
Space between 2 neurons where neurotransmitters are emitted
Presynaptic neuron
Neuron before synapse
Postsynaptic neuron
Neuron after synapse
Multipolar neuron
3+ extensions, 1 axon, many dendrites
Bipolar neuron
2 extensions, central body
Unipolar neuron
1 extension, 2 processes
Sensory neurons
Unipolar and carry info from PNS to CNS
Interneurons
Multipolar, only in CNS
Motor neurons
Multipolar, send info from CNS to PNS