Complex sentence: Most of it is stored in the posterior pituitary to be released into the bloodstream; however, some AVP is also released directly into the brain, where it plays an important role in social behavior and bonding.
Split into simpler sentences: Most of it is stored in the posterior pituitary to be released into the bloodstream; however, some AVP is also released directly into the brain. AVP released in the brain plays an important role in social behavior and bonding.