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Sagot :
The minimum power required for the stimulus to provoke the response of muscle contraction is called the threshold stimulus. No response is visible if the magnitude of the stimulus is below this threshold fee. The sliding filament principle explains the contraction of muscular tissues while the threshold stimulus is achieved.
A single muscle twitch is an unmarried contraction in response to a quick threshold stimulation. Threshold stimulation: the smallest amount of stimulation that brings about sarcomere shortening. A threshold stimulation is the smallest quantity of stimulation as a way to honestly result in a contraction.
At an important point (the firing threshold for the muscle mobile) a self-generating movement capability is caused, causing the membrane capability to reverse and turn out to be in short effective. The motion ability propagates over the muscle fiber membrane to set off the contractile manner.
The threshold is the cost of the membrane capacity which, if reached, results in the all-or-nothing initiation of movement potential. The preliminary or growing section of the motion potential is known as the depolarizing segment or the upstroke.
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