Vertebrate striated muscle contraction is controlled (regulated) by the action of the proteins troponin and tropomyosin on the actin filaments. Nervous stimulation causes a depolarisation of the muscle membrane (sarcolemma) which triggers the release of calcium ions from the sarcoplasmic reticulum.
n. 1  Abnormally fast or deep respiration, which results in the loss of carbon dioxide from the blood, thereby causing a fall in blood pressure, tingling of the extremities, and sometimes fainting.
Pain or discomfort, Pressure or heaviness, Slow or irregular breathing. Pain or discomfort, Slow or irregular breathing, Wheezing. Muscle cramps or spasms (painful), Pain or discomfort, Slow or irregular breathing. Rapid heart rate (pulse), Shortness of breath, Slow or irregular breathing.