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15 Cards in this Set

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  • Back
Heritability
A statistical estimate of the fraction of observed measure of the overall amount of difference among people in a population that is caused by differences in heredity.
Parts of the Neuron
dendrite
cell body
axon
synaptic terminals
synapse
Types of Neurons
sensory neurons
motor neurons
interneurons
sensory neurons
detect information from the physical world and pass that info along to the brain
motor neurons
one of the three types of nerons, these efferent neurons direct muscles to contract or relax, therby producing movement.
interneurons
these neurons communicate only with other neurons, typically within a specific brain region.
Action potential
The nueral impulse that passes along the axon and subsequently causes the release of chemicals from the terminal buttons.
Resting membrane potential
the electrical charge of a neuron when it is not active.
mylin sheath
increases the speed of transmission along the axon.
refactory period
neuron recharges
absolute
no impluse from stimulation
relative
impulse if stimulus is strong enough.
Events that end transmission
reuptake
enzyme deactivation
autoreceptors
reuptake
the process where the neurotransmitter is taken back into the presynaptic terminal buttons, thereby stopping its activity.
enzyme deactivation
the process whereby the nuerotransmitter is destryoed by an enzyme, thereby terminating its activity.