By contracting, muscles pull on bones and allow the body to move. Muscles can only contract. They cannot actively extend, though they can move or relax back into the non-contracted neutral position. Therefore, to move bones in opposite directions, pairs of muscles must work in opposition
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Which statement about treating depression is true? D.) symptoms of depression disappear as soon as treatment begins Anxiety Disorder condition in which a real or imagined fear, such as fear of social situations, is difficult to control
