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.
Physiology. Your intercostal muscles are located between your ribs. These muscles expand and contract to move your ribs, giving your lungs enough room to inhale and exhale. You have three layers of these important respiratory muscles â the external, innermost and internal intercostal muscle layers.hysiology. Your intercostal muscles are located between your ribs. These muscles expand and contract to move your ribs, giving your lungs enough room to inhale and exhale. You have three layers of these important respiratory muscles â the external, innermost and internal intercostal muscle layers.