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In what year did Freedom's Journal,the first black-edited newspaper in the United States,first appear?
Threshold
The minimum level of stimulus intensity required to produce a response or result.
Excitatory Signals
Nerve impulses that increase the likelihood of a neuron firing, promoting the transmission of signals through the nervous system.
Refractory Period
In physiological context, a period immediately following stimulation during which a nerve or muscle is unresponsive to further stimulation.
Neuron
A cell of the nervous system that is specialized to transmit information throughout the body.
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