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 â Tachypnea is the medical term used to define an elevated respiratory rate. This rapid respiratory rate is usually shallow, vs hyperpnea which can be rapid and deep. Dyspnea â Dyspnea refers to the sensation of shortness of breath, and can occur with an elevated, a normal, or a decreased respiratory rate.