is when the mind supports the efforts of the body and vice versa. A) Total fitness B) Heart rate C) Muscle tone D) Strength-building pls help

Insulin is a peptide therapeutic used to manage type 1 diabetes, which affects more than 20 million people worldwide according to the international diabetes federation. a significant limitation to the broad distribution and use of insulin to treat type 1 diabetes is the fact that it must be administered by injection rather than orally. why is insulin administered by injection and not orally?