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The threshold stimulus is the stimulus required to create an action potential. So any stimulus under this level will not cause muscle contraction, while a stimulus above this level will cause the muscle to contract. The higher the stimulus the more muscle fibers are recruited, and thus the higher the response.

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What is the minimal level of stimulus to cause a muscle contraction?

it is known as the threshold stimulus usually seen in tonic contraction


The minimum stimulus needed to cause a contraction is called the?

The minimum stimulus needed to cause a contraction is called the threshold stimulus. This is the minimal level of stimulation required to activate muscle fibers and initiate a contraction response.


What is the minimal intensity of stimulation necessary to trigger a muscle contraction?

threshold stimulus


What is the minimal stimulus needed to elicit a muscle contraction is called?

Threshold Stimulation


What is a stimulus that results in no perceptible contraction?

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.


The minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus?

true


Stimulus at which the muscle first contracts perceptibly?

Threshold stimulus


A muscle fiber will not respond to a stimulus until that stimulus reaches what?

A muscle fiber will not respond to a stimulus until that stimulus reaches the threshold level needed to trigger an action potential. This threshold level is the minimum amount of stimulus required to elicit a response from the muscle fiber.


What voltage produced maximal contraction of the muscle?

The voltage that produces maximal contraction of a muscle is called the maximal stimulus voltage. This voltage is typically higher than the threshold voltage required to elicit a muscle contraction and ensures that all muscle fibers within a motor unit are stimulated to contract simultaneously, leading to a stronger contraction.


What does not act as a stimulus to initiate a muscle contraction?

a change of temperature.


How does the frequency of stimulation affect the amount of force generated by the muscle?

Increasing the stimulus to an isolated muscle increases the strength of a contraction. A muscle begins to contract when the stimulus is given; however, if the muscle does not finish contracting before the next stimulus hits, then the force of the contraction will increase to finish the contraction. This is known as wave summation.


What is the first phase after a stimulus in a muscle contraction?

The first phase after a stimulus in a muscle contraction is excitation-contraction coupling. This involves the transmission of the action potential along the sarcolemma and the release of calcium ions from the sarcoplasmic reticulum.