Which is released into the blood stream during exercise?
a. insulin
b. endorphin
c. serotonin
d. melatonin

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny.i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

What might cause conflict because of how a person was raised?

How does emergency conception reduce the risk of pregnancy