"Step on a crack, you'll break your mother's back", would typically worry a child in the

When cancer cells have are no longer contained in their reproduction and have spread to multiple sites in the body, they are said to have_______

a. eliminated the effectiveness of helper Z cells in the body b. mutated c. metastasized d. infiltrated

Brain imaging studies in adolescents with bipolar disorder point to abnormalities in parts of the brain that ____

a. regulate emotion b. plan executive functions c. control memory d. regulate sleep patterns