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.
Along with the diaphragm, the intercostal muscles are one of the most important groups of respiratory muscles. These muscles are attached between the ribs and are important in manipulating the width of the rib cage.There are three layers of intercostal muscles.long with the diaphragm, the intercostal muscles are one of the most important groups of respiratory muscles. These muscles are attached between the ribs and are important in manipulating the width of the rib cage.