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When a stimulus stimulates a neuron above the threshold, the action potential is generated.
A response is an action of change in behavior that occurs as a result to a stimulus. The stimulus can be either internal or external.
Reaction
A reflex
The FREQUENCY of action potentials that are conducted into the central nervous system serves as the code for the strength of the stimulus. This frequency code is needed because the amplitude of action potentials is constatnt (all or none). Acting through changes in action potential frequency, tonic receptors thus provide information about the relative intensity of a stimulus.
A stimulus causes an action or response, like the ringing of your alarm clock if you didn't sleep through it.
Through repeated pairing, the conditioned stimulus becomes associated with the unconditioned stimulus, resulting in the conditioned stimulus elicing the conditioned response on its own. This process is known as classical conditioning and involves the formation of a learned association between the two stimuli.
something that incites to action or exertion or quickens action, feeling, thought, etc
Something that incites an action, a feeling or a thoughtsomething that causes involuntary action
A Reaction
Stimulus (singular) and Stimuli (plural)
Something that causes an involuntary action