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15 Cards in this Set

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  • Back
Phrenology
Frans Gaul's Theory of reading bumps on the head and that the brain was in sections
Nodes of Ronvier
the gaps between the mylin sheaths
Axon Terminal Buttons
Where neurotransmitters are started and released
multiple sclerosis
the degeneration of the mylin sheath
Refactory Period
A time when the nueron is recharging and cannot fire
Resting Potential
Charged and ready, positive outside, negative inside
Biological Psychology
A branch of psychology concerned with the links between biological behavior
Neurons
A nerve cell; the basic building block of the nervous system
Dendrite
The bushy, branching extensions of a neuron that recieve messages and conduct impulses toward the cell body
Axon
The extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands
Mylin Sheath
A layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next
Action Potential
A neural impulse; a brief electical charge that travels down an axon. It involves sodium and potasium.
All-or-None
The action potential always has the same strength
Exitory Signals
Stimulate transmission
Inhibitory signals
slow down or stop transmission