Examples of tension in the following topics:
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- Muscle tension is influenced by the number of cross-bridges that can be formed.
- The pull exerted by a muscle is called tension.
- If more cross-bridges are formed, more myosin will pull on actin and more tension will be produced.
- This results in fewer myosin heads pulling on actin and less muscle tension.
- Muscle tone is residual muscle tension that resists passive stretching during the resting phase.
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- Cohesion allows for the development of surface tension, the capacity of a substance to withstand being ruptured when placed under tension or stress.
- Cohesion and surface tension keep the hydrogen bonds of water molecules intact and support the item floating on the top.
- It's even possible to "float" a needle on top of a glass of water if it is placed gently without breaking the surface tension .
- In another example, insects such as the water strider use the surface tension of water to stay afloat on the surface layer of water and even mate there.
- The weight of the needle is pulling the surface downward; at the same time, the surface tension is pulling it up, suspending it on the surface of the water and keeping it from sinking.
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- Water from the roots is pulled up by this tension.
- This is called the cohesion–tension theory of sap ascent.
- The cohesion-tension theory explains how water moves up through the xylem.
- The decrease creates a greater tension on the water in the mesophyll cells, thereby increasing the pull on the water in the xylem vessels.
- The cohesion–tension theory of sap ascent is shown.
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- Muscle is a soft tissue that is highly specialized for the
production of tension which results in the generation of force.
- Muscle cells,
or myocytes, contain myofibrils comprised of actin and myosin myofilaments
which slide past each other producing tension that changes the shape of the
myocyte.
- Numerous myocytes make up muscle tissue and the controlled production
of tension in these cells can generate significant force.
- Voluntary refers to whether the
muscle is under conscious control, striation refers to the presence of visible
banding within myocytes which occurs due to organisation of myofibrils to
produce a constant direction of tension.
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- The air-tissue/water interface of the alveoli has a high surface tension, which is similar to the surface tension of water at the liquid-air interface of a water droplet that results in the bonding of the water molecules together.
- Surfactant is a complex mixture of phospholipids and lipoproteins that works to reduce the surface tension that exists between the alveoli tissue and the air found within the alveoli.
- By lowering the surface tension of the alveolar fluid, it reduces the tendency of alveoli to collapse.
- Surfactant works like a detergent to reduce the surface tension, allowing for easier inflation of the airways.
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- It is a
cycle of repetitive events that cause actin and myosin myofilaments to slide
over each other, contracting the sarcomere and generating tension in the
muscle.
- During stretching this tension is release and the I and H bands expand.
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- Hydrogen bonding in water contributes to its unique properties, including its high boiling point (100 °C) and surface tension.
- The hydrogen bonds formed between water molecules in water droplets are stronger than the other intermolecular forces between the water molecules and the leaf, contributing to high surface tension and distinct water droplets.
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- Therefore, a positive Ψp (compression) increases Ψtotal, while a negative Ψp (tension) decreases Ψtotal.
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- This arrangement helps the tissue resist tension that occurs from all directions.
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- Trabeculae in spongy bone are arranged such that one side of the bone bears tension and the other withstands compression.