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Which type of contraction can be seen in an isolated muscle but plays a minimal role in normal muscle activity?
Isometric contractions can be observed in an isolated muscle, where the muscle generates force without changing length. However, they play a minimal role in normal muscle activity, which often involves isotonic contractions—where the muscle changes length to produce movement. Isometric contractions are typically used for stability and maintaining posture rather than for dynamic movements.
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What is an Activity that combines muscle contraction with repeated movement?
An activity that combines muscle contraction with repeated movement is Isotonic execrise
What is the minimal stimulus needed to elicit a muscle contraction is called?
Threshold Stimulation
What is the minimal intensity of stimulation necessary to trigger a muscle contraction?
threshold stimulus
What is the minimal strengh of stimulation needed to elicit a muscle fiber contraction called?
Threshold
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 minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus?
true
The molecule that provides the energy to the muscle for contraction is?
Adenosine triphosphate (ATP) is the molecule that provides energy to muscles for contraction. When ATP is broken down during muscle activity, it releases energy that fuels muscle contraction.
What is the minimal impulse that can initiate a muscle contraction?
Threshold stimulusThe minimal level of stimulation required to cause a fiber to contract is called the THRESHOLD STILULUS.
What is the component in muscle tissue that contains the ATPase activity required for contraction?
myosin
Does cardiac electrical activity immediately precede the contraction of the cardiac muscle?
Yes
How is ATP utilized in muscle contraction?
ATP is used in muscle contraction to provide energy for the movement of muscle fibers. When a muscle contracts, ATP is broken down into ADP and phosphate, releasing energy that powers the movement of the muscle fibers. This energy is essential for the contraction and relaxation of muscles during physical activity.
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.
