Answer:
Archaebacteria. Archaebacteria are the most recent addition to the kingdoms of organisms. ...
Eubacteria. Eubacteria are also single-celled bacterial organisms. ...
Fungi. ...
Protista. ...
Plants. ...
Animals.
When an external stimulus crosses the threshold, a muscle fibre will respond.
<h3>The level of the threshold</h3>
- For the identification of the electrical activity carried out by the active muscles, the threshold level is a crucial consideration.
- A portion of the electrical activity carried out by the target muscles may be excluded if the chosen threshold level is higher than the overall activity.
<h3>What is the stimulus threshold for muscle contraction?</h3>
- A certain stimulus magnitude is necessary for muscle contraction.
- The threshold stimulus is the smallest amount of force needed for a stimulus to cause a muscle to contract in response.
- If the stimulus intensity is less than this threshold value, there is no response.
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<span>Lysomes are the organelles responsible for holding chemicals needed for digestion.</span>