subthreshold stimulus
A subthreshold stimulus is one that does not generate a strong enough signal to elicit a perceptible contraction in muscle fibers. It is below the threshold required to cause an action potential and result in muscle contraction.
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The smallest increase in the intensity of a stimulus that a person can detect is called the just noticeable difference (JND). This is the minimum amount by which two stimuli must differ in order for the difference to be perceptible to an individual.
Perceptible information is required for army people to attack. This is the sentence that uses the word perceptible.
Exaggerating the stimulus is also seen as amplifying the stimulus. This is seen in outer ear hair cells.The mechanism you refer to is probably a positive feedback mechanism: more of the stimulus causes more of the stimulus. This is in contrast to a negative feedback mechanism, whereby more stimulus results in processes that strive to attenuate (lessen) that stimulus.
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The contraction for "you would" is "you'd".
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The approaching tiger was barely perceptible in the tall grass.
A simple association between a stimulus and a response is called classical conditioning. This process involves learning to associate a neutral stimulus with a biologically potent one, which results in the neutral stimulus producing the same response.
The antonym for "perceptible" is "imperceptible." If something is perceptible, it is able to be seen or noticed. Conversely, if something is imperceptible, it is not able to be seen or noticed.
The price increase has had no perceptible effect on petrol sales.