Tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys<span> consist of a series of choices that lead the user to the correct name of a given item. "</span>Dichotomous<span>" means "divided into two parts".</span>
The muscles are composed inside mainly of fibers, filaments and proteins, where it is important to consider the <u>length-tension</u> relationship of the thick and thin filaments to know the tension.
<h3>What is muscle contraction?</h3>
It is an organized and natural event that takes place at the level of the muscles when the fibers and proteins inside them come together, and tension is produced in the area.
<h3>Characteristics of muscle contraction</h3>
- In a muscle contraction, a tension is generated that depends on the length-tension relationship, which causes a displacement of the muscle filaments.
- The proteins actin and myosin join together, and a force is generated so that the final movement is achieved.
- To know the tension, the muscle changes length and measurable external work is produced from the force and distance traveled.
Therefore, we can conclude that the contraction allows us to make movements to reach and carry our extremities to different places.
Learn more about muscle contraction here: brainly.com/question/14625676
<span>The perfect small bubbles are a trapped air bubble.</span>
Answer: origin.
The end of a muscle that is attached to the immovable bone is called the origin.
In some parts I have found that they refer origin of a muscle as the bone, while in other parts I have found that they refer tha origin is part of the muscle.
Anyway, the question is refering to this part: the origin of a muscle, which is a the end of a muscle that is attached an immovable or less movable bone.