Part 1 of 1 - question 1 of 20 5.0 points which one of the following choices best represents a long-term benefit of cardiorespiratory fitness? a. it relieves stress and boredom. b. it reduces mental and muscular tension. c. it improves self-esteem and self-confidence. d. it provides more efficient delivery of oxygen to the muscles. reset selection mark for review what's this?

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?