animal's hypothalamus can signal the pituitary gland to release the (ADH ). ADH helps regulate fluids within the body. When ADH is released, the kidneys will retain fluid due to dehydration. An animal's adrenal cortex also regulates fluids by releasing aldosterone . When aldosterone is released , the kidneys will excrete more fluid. Based on this information , what would cause an increase in the levels of ADH in an animal? Identify the animal systems that are interacting to produce this outcome .