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.
Tachypnea is the term used to describe breathing that is rapid and shallow. Abnormally fast breathing is a symptom that is often caused by the build up of carbon dioxide in your lungs. Whenever the ability to expire carbon dioxide decreases, it causes a buildup of it in your blood.