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excitation |
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excitationAddition of a discrete amount of energy to a system that changes it usually from a state of lowest energy (ground state) to one of higher energy (excited state). For example, in a hydrogen atom, an excitation energy of 10.2 electron volts is required to move the lone electron from its ground state to its first excited state. The excitation energy stored in excited atoms and nuclei is usually emitted as ultraviolet radiation from atoms and as gamma radiation (see gamma ray) from nuclei as they return to their ground states. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Effect of myoplasmic pH on excitation-contraction coupling in skeletal muscle fibres of the toad. Trained soleus muscles demonstrated little post-fatigue potentiation of torque, suggesting that training may affect the muscle's excitation-contraction coupling mechanism. It may be the case that the paralyzed muscles of subjects with SCI do not experience failure of excitation-contraction coupling to the extent of the nonparalyzed muscles. |
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Excitation-contraction coupling
