Melatonin is a relatively safe supplement when used in the short-term, and melatonin side effects are uncommon. Melatonin safety in the long-term has not been determined in randomized, controlled studies. In general melatonin appears to be relatively nontoxic, even at higher doses such as 3 to 5 mg once a day.
Best Answer: During inspiration (breathing in) our external intercostal muscle contract and the internal intercostal muscle relax together with the movement of ribs and the thorax, this increases the volume of the throacic cavity.Air pressure in our lung decrease as the volume increases.ating Newest Oldest. Best Answer: During inspiration (breathing in) our external intercostal muscle contract and the internal intercostal muscle relax together with the movement of ribs and the thorax, this increases the volume of the throacic cavity. Air pressure in our lung decrease as the volume increases.
The primary muscles used in inspiration include diaphragm and external intercostal muscles. The secondary muscles used in inspiration include the sternocloidomastoid and scalini. Expiration. The primary muscle involved in expiration is the diaphragm. The secondary muscles involved in expiration include the internal and external intercostals, external oblique, internal oblique, transverse abdoninal and rectus abdominis.