Now let’s review the hormones of the anterior pituitary. Tropic hormones stimulate glands to produce other hormones.These hormones typically bind to receptors on the cytoplasm. Peptoid hormones are large polymers of amino acids, and not necessarily non-polar.This gives them the opportunity to bind to nuclear receptors inside the cell. Steroid hormones are non-polar, which means they can cross the plasma membrane.Medical School Applications: Timeline and Tips.