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This effect can be observed in nylon strings of classical guitars, whereby the string contracts as a result of heating. [2] The effect is due to the decrease of entropy when long chain molecules are stretched. If an elastic band is first stretched and then subjected to heating, it will shrink rather than expand.
If plasma osmolarity rises above 290 mOsmol/L, then water will move out of the cell due to osmosis, causing the neuroreceptor to shrink in size. Embedded into the cell membrane are stretch inactivated cation channels (SICs), which when the cell shrinks in size, open and allow positively charged ions, such as Na + and K + ions to enter the cell ...
Stretch-activated ion channels are required for the initial formation of an action potential from a mechanical stimulus, for example by the mechanoreceptors in vibrissae (whiskers) of some animals such as rodents. Afferent nerve fibers responsible for sensory stimulus detection and feedback are especially sensitive to stimulation.
For example, if the intended movement direction is associated with stretch of the spindle-bearing muscle, Ia afferent and stretch reflex sensitivity from this muscle is reduced. Gamma fusimotor control therefore allows for the independent preparatory tuning of muscle stiffness according to task goals.
Stretch of the muscle membrane opens a stretch-activated ion channel. The cells then become depolarized and this results in a Ca 2+ signal and triggers muscle contraction . No action potential is necessary here; the level of entered calcium affects the level of contraction proportionally and causes tonic contraction.
A teacher and a teenage student were killed in Monday’s shooting at the Abundant Life Christian School in Madison. Two students are in critical condition and four other students suffered non ...
November sales, excluding auto and gas, rose 0.2%, below consensus estimates for a 0.4% increase. The control group in Tuesday's release, which excludes several volatile categories and factors ...
The proteins in the pili are then broken down to shrink the pili pulling the cell closer to the surface or object that was it was attached to. [7] b) Specific motility membrane proteins: Transmembrane proteins are attached to the host surface. This adhesion complex can either be specific to a certain type of surface like a certain cell type or ...
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