The ADH (Vasopressin - Antidiuretic Hormone) feedback loop is an example of negative feedback in the kidneys. Negative feedback occurs when the body works to counteract changes made to the body system. ADH is released when there isn't enough water (dehydration) so that the body can retain as much liquid as possible.
Answer: because mammals have more complex biological structures; limb regeneration would require sophisticated controls to ensure that limbs and organs don’t grow out of control.
